Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eadcd419b2e9ce0…

MALICIOUS

PDF

79.5 KB Created: 2021-03-24 00:24:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d6481d27be952825f1dd09c7667a7ce8 SHA-1: 943c96a5358d29a51229a7affb17add3fdbfd8b0 SHA-256: 3eadcd419b2e9ce0cb4c03173dde14a0467fc55f42f7fee01a93db9b9965d6c1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/award?keyword=changes+black+sabbath+sheet+music+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4466366/normal_5fc837212216e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384318/normal_60007538ea0a6.pdfIn PDF document text
    • https://lonokowikur.weebly.com/uploads/1/3/5/3/135384913/afa32750.pdfIn PDF document text
    • https://dotomogef.weebly.com/uploads/1/3/4/7/134760479/wiribetokawerom.pdfIn PDF document text
    • https://dunogijejuj.weebly.com/uploads/1/3/0/8/130813547/gibikuboti.pdfIn PDF document text
    • https://xinosete.weebly.com/uploads/1/3/0/9/130968926/mejazefinoberevun.pdfIn PDF document text
    • https://basoxafal.weebly.com/uploads/1/3/4/4/134499196/jaxodizuxurupo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jakujakula/19372038592.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/show_carrier_logo_on_status_bar_android.pdfIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_858384097be94be58c36a38b2911ffaa.pdf?index=trueIn PDF document text
    • https://8d537faf-e869-4ed9-a29f-988560fab1dc.filesusr.com/ugd/0cce51_3a9c68881efa445786c2d5bdb6bdff32.pdf?index=trueIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_214e7dca351842b7b1c944e86a642603.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c03b9907-8f4c-4687-bed9-ded0c0bee3e0/22146247581.pdfIn PDF document text
    • https://1347de4c-4e54-429a-b84c-372e60bc5a2b.filesusr.com/ugd/6c98bc_fec0a6776b1749d1a36eb1d4f9487fe3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/75426652308.pdfIn PDF document text
    • https://b8436764-02b3-4471-8711-1e8fed235cf0.filesusr.com/ugd/3b3fbb_82ba04dc96c541efb5e8f39985ae851f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobobowu/echo_gt_225_fuel_mixture.pdfIn PDF document text
    • https://288c7b4b-0494-48f6-8ee2-9dd519b96b0a.filesusr.com/ugd/a107db_278513f53fb64345965b73c7c979db0d.pdf?index=trueIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_2c2440e244df4b42b7935f3cd4245800.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cb75c03-872c-4ee9-bae0-86606e9152b9/54754717119.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_0755add389df44689972fdf6c4a66d4d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/597a1a6c-ceb6-4f34-b3a7-3c14785b09de/91252659937.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/how_truthful_is_the_crown_season_3.pdfIn PDF document text
    • https://68f06c25-eb64-4e0a-94e3-a0e33e610147.filesusr.com/ugd/463ace_628e95ff8cfd4dc9b57d515857837120.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 5580 bytes
SHA-256: 59e05966b43d90d3ae56d0cf12b5c8e733649c353b29cdb152a4e59c4b05522b
font_01_sfnt_off00010bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC1 10704 bytes
SHA-256: 04358b187b819cd7dca7b2e6af5e244cbb3d3704ddb07be93698c5cd7f32716b

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