Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac2d19e09fbc032…

MALICIOUS

PDF

88.1 KB Created: 2021-09-08 22:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4d1d1c36b69e8094434b83420955565f SHA-1: beead0d48fe4b200f49feab28dfb398972a1bcd3 SHA-256: 2ac2d19e09fbc0329c6ab9b80325f3e44018aea828830f6e94d9f1ac602265e3
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external files, many hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests a business email compromise (BEC) or financial scam. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a malicious document designed to trick users into downloading further malicious content, likely exploiting PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://drafthe.ru/uplcv?utm_term=minecraft+accounts+alts PDF link annotation
    • http://xnucleus.com/members/member_images/files/6762692689.pdfIn PDF document text
    • https://noursportevents.com/wheelmarine/userfiles/file/lugelajo.pdfIn PDF document text
    • https://plasy.com/uploads/file/lekuzezifuwagetewiv.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16132e906941de---55613976651.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/muvuxu.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/jonawav.pdfIn PDF document text
    • https://lazeo.nl/userfiles/file/18708413593.pdfIn PDF document text
    • http://ambulatorioveterinariopisillibertozzi.eu/userfiles/files/tiwuf.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/35649087482.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b7e204063---bigiwasamu.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/dajudebox.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/43331218959.pdfIn PDF document text
    • http://tainghe.vn/userfiles/file/nifemuzuzumepebuf.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/besakasole.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/vurepiwofizigedowawe.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/51598121616.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/6e5e63b3c22e26edae17d8863a6cd25d/nipodonemexavufor.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/59981600230.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/jobukup.pdfIn PDF document text
    • https://rumahbaruku.com/contents/files/8424748064.pdfIn PDF document text
    • http://slavutich-media.ru/userfiles/file/taroxoroxomizelijed.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210903_9C7094F77F2614B0.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/75450731993.pdfIn PDF document text
    • http://precisao.net/files/files/netenija.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/20420141516.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_off0000f029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF029 10420 bytes
SHA-256: 398d4a59a12e726b059d10b801b9daf3e4561bb196163ea766d7d6ea4eb73d8b
font_01_sfnt_off000107ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFE 19308 bytes
SHA-256: b334745900451c79de891b7b85137c3a1af620643dbf5e4c3a5e6e3e96761b53

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