Malicious PDF — malware analysis report

Static analysis result for SHA-256 465496f04c8a7d07…

MALICIOUS

PDF

83.3 KB Created: 2021-04-05 15:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 09dee7ca7517c2924b2cedbc003793dd SHA-1: a264a94a6b3b546fee21413553111544fd0ee965 SHA-256: 465496f04c8a7d074618029adaffa54b56b314fe3f3f3b8f7d9432896ccd46e8
186 Risk Score

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 0.9998

Heuristics 6

  • 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.
  • 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://fokemale.ru/wix?keyword=lion+king+denver+2015+ticket+prices PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427274/normal_603c72287c840.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470683/normal_5ff2286a0e906.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/Yibjbhe/dream_house_days.pdfIn PDF document text
    • https://cdn.sqhk.co/winudesuw/hjuriaJ/lidogotopumudufutelixen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369796/normal_5fefc9afa90a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468550/normal_60463863bf3e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373749/normal_5fc8a63bb9772.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe7a1ab4-ea61-4307-8768-4b7987540af9/troy_bilt_tb20cs_carburetor_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61a1fe18-c36a-42f0-a9d8-bccf9eba5e99/tilabe.pdfIn PDF document text
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_c1c3a9ab088641638fa96501d6d6437b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebc46610-9494-4f87-ac66-b5a0da91fe23/16183685732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57292d42-f053-4d7a-9a93-ae47c45541cc/31281735607.pdfIn PDF document text
    • https://933afb0c-60ca-4ff4-ba38-e7c804ca925d.filesusr.com/ugd/941881_0abec386db11472aadbfd69c6a425693.pdf?index=trueIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_3451e283b8e1467498e7bcb0710bb254.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/69247572-3250-498d-be2a-7426676f0744/jijujofozufomuxivupirix.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/a._n._jell_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65bf13d7-2088-4ac1-a096-56ec37e93441/red_rising_tv_show_auditions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4601f70-f882-4ee1-bef5-359b9730b972/3608510672.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/adobe_flash_professional_bagas31.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/does_nike_donate_money.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DD 5516 bytes
SHA-256: c7d1ea2afde098190eb14f7c43408d265f5485f04a60776fdb8b8b18cbd735dc
font_01_sfnt_off000117cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CB 11144 bytes
SHA-256: c739f7214e01f71832bc6ed84dfc8066d03412223058f572fafb4ccb2bd5accd