Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aeb9c94fa9d5c80…

MALICIOUS

PDF

89.8 KB Created: 2021-07-31 23:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: fcbf8408277638b20afd66d1210a320b SHA-1: 0e3e80ca1ec27ba0b150f776a021350128c73da9 SHA-256: 1aeb9c94fa9d5c8095b3e6843ce0fee0437de22c424c3f0fa787861c793f7b7a
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting an attempt to redirect users to malicious content or downloads. The presence of a 'Remote-support tool lure' heuristic indicates the document likely instructs the user to install or connect to such tools, a common tactic for gaining unauthorized access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9884

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pixomot.ru/uplcv?utm_term=mp4+hollywood+movie+in+hindi+dubbed+free+download PDF link annotation
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/pg2r9g6i1mq6orij5rg1bkcb85/kuduxatusi.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/29dg2srvs6vi1eu02rf3fhttc7/boratojolojigamawako.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/mavepuxazeweposelon.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160720b45d846c---rifilozakizixowazafixo.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab9fc10b48---28619202695.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/20591586229.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/toditivazojasibawivuturid.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607516a709fd1---23526135214.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/95256717634.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/34643510378.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/46541425320.pdfIn PDF document text
    • http://apsons.eu/files/file/jevofaxorif.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b586257c236---30050022837.pdfIn PDF document text
    • http://italiancousins.net/clients/5/54/54f3d33123424807706abe9154268524/File/kilulasuvomegerokexanejo.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/8dcd7e33f707b3a541815cd9dfc1ee7e/xezatatijedetuzupedaf.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/gukuzegefovukivimufepokeb.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/41978785021.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8bc2d9956---96208215945.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/hmhatfl4v59u4er5qn1v3gk6m6/80362990079.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad6964eb16e---55302840276.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/fa16f2ac84902abbcf19d1ffce95e048/jaxotabubujakikagag.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/detegitababaxaxawimu.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609965766590a---pamisuvugexisexov.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af90cf1cf0---duvepabuzidifogidet.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c76e5bc112e---56665701775.pdfIn PDF document text
    • http://abc-tel.ru/data/File/14335969892.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86C 11072 bytes
SHA-256: 065cd22f0ffcefba5d67cb2f1945b443963f89dd652839aea32c27ae4fe52ba7
font_01_sfnt_off000111d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129EB 17492 bytes
SHA-256: 68e1d5e16a59b7391656a76e8df8604e435277eeb3cde814bbb8b033a9296961

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