Malicious PDF — malware analysis report

Static analysis result for SHA-256 299aa94209edf5b4…

MALICIOUS

PDF

93.4 KB Created: 2021-07-17 22:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3986db3faaedd11ee0ae9968dba32d5f SHA-1: 4d239b1aee09db7cee87981e6cecf484a87c692d SHA-256: 299aa94209edf5b462233bfc2478c08d977c484adc048cac964de14d3c8b7a39
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious or phishing content. The document body is unreadable, but the heuristics and numerous URLs suggest a link farm designed for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/rfaetnkf73cnonid8fgmvaorfl/50890208878.pdf In PDF document text
    • https://geneticapanama.com/userfiles/file/92511701371.pdfIn PDF document text
    • https://masukpt1.com/contents//files/91896638780.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/96696158366.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/c56d40a66db7b28d2b4f17e3e2d62bd8/51307775165.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea1073e165---bulejejodurokenawekus.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/dujaxu.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/81kakf3e2ql7d993ngsj7fvab0/belolewigevukak.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/vuwet.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/9bk0pr2bd6g8t8e10dchvd5u63/xeviseforub.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/rukubetukorej.pdfIn PDF document text
    • http://lhs1965.com/clients/880801/File/mizosedegokoritoxaxa.pdfIn PDF document text
    • http://miamiokclassof65.com/clients/d/db/dbefc63a503cf3d3a4f9fb61678ecc08/File/guvumud.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5005ee9335---15940465393.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c380842968---wupedikomanekiluw.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160788ba4bd291---fetoni.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/t8g7de73dfmmqa2gf5jm2m610e/jupelujuxazewudo.pdfIn PDF document text
    • http://cosyromania.com/media/file/35782384624.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/vvg37djicn28vbuatc9uvt16o3/99830895171.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/512d3c9a09b113c4dfaafa1009c5aa8a/wixilomoduwepimub.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160798abb9d21f---71261932301.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/54412739182.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/9f2010442d457bb78c1447bfd9f90ae1/podezodinozepulijik.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/40798019453.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/rondcc2ckhstq0ahedktcuolp5/zaripukarodogala.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=46+biblical+meaningPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC30 18452 bytes
SHA-256: ba04cbb305ec26622777faf40fbaf637b5c4d62e4c7058cde81039c34b4fff54
font_01_sfnt_off00010a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4B 16972 bytes
SHA-256: 6cc8293fe54b22f4a9a38c4820064e48f5773d1b3e95d1785b62fcfd59db9129
font_02_sfnt_off000136fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F13 10376 bytes
SHA-256: 04ba99364b919046874b3964f10bdd59c5ec96384fb9e45fd42ea24b67132a92

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