Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba29e653b4bdd9e…

MALICIOUS

PDF

80.8 KB Created: 2021-08-16 06:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7f8265fe27679f9123ed3d6c1ca6e947 SHA-1: 5d5e3c915fc0bfd4db93c8c18e5a8fb60362f722 SHA-256: 4ba29e653b4bdd9eebfb2dfaf888e596d820e3c354aa38789c5bff989ebd14df
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • 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 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 http://mywayrtk.info/userfiles/file/xenina.pdf In PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/8f87298dd9830ad7f9dd2295ef35908a/jezalakozedid.pdfIn PDF document text
    • http://roland-toys.eu/userfiles/file/85606363439.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c5973c406b7---60584625155.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/vakuwuwelinuf.pdfIn PDF document text
    • https://nhanloc.net/userfiles/file/21903521699.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/6e8lpjffsm24i62i8keekj5td7/87303217665.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/82416725322.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/ragixezibibometozoli.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c473db836a3---pisaratalokokax.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb8d9cb10f---68719892400.pdfIn PDF document text
    • http://schokozentrale.de/idata/tuweroxufo.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/bizogekufawadil.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/6epcut0jaln8msedhupa31k2gk/pexabenesavuwudaj.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/7e87e16f6b811a8e5106f1ddc824b4c0/bekalajoxobig.pdfIn PDF document text
    • http://danguykhoidoanhnghiephp.vn/Upload/files/dubukanixikitev.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/vemakuwo.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/e001f68624a0c9068375eff2a2578567/xefowerudabilulir.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/79763306863.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac10eeb8165---22457069109.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/70781022490.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/60012320463.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8ab7bd3d1---4094110397.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/xuwububazubetenegurar.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/67e3abae8fd2a900d12d44426591ada8/38491760973.pdfIn PDF document text
    • https://mfdesign.hu/files/file/66703201779.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=can+you+get+gmod+on+ipadPDF link annotation
    • 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_off0000da3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3F 16808 bytes
SHA-256: e9219d532003d40f62be59e5ac5058c50385d1b399054e9f5083aa43c4f4237b
font_01_sfnt_off00010578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10578 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8F 10664 bytes
SHA-256: f075eeece516a765eb9498d8e6947a97c1a7b2f4cf40c230a8d75bc04cb9a742

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