Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec752e092d8b115…

MALICIOUS

PDF

79.8 KB Created: 2021-03-10 01:49:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1c50697248825920b4834c5b2b510804 SHA-1: e15d7ea2102ca5e4ffbaeec577e64304789fbba3 SHA-256: eec752e092d8b115e6684521f2617bd3bfee5deb6d348dc0d1686e325446a10c
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV heuristic strongly indicate malicious intent, likely for distributing further malware or leading users to phishing sites. The document body's mention of 'Video editor ipad' and the presence of embedded URLs support a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://pelibifir.ru/123?utm_term=video+editor+ipad PDF link annotation
    • http://lomipojiposo.iblogger.org/96873351831.pdfIn PDF document text
    • http://xajoboki.iblogger.org/97125788919.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/how_to_wear_a_face_mask_properly_with_glasses.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451356/normal_5fd1ed359b417.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445541/normal_5ffa1db6b49f4.pdfIn PDF document text
    • http://juzufezike.mygamesonline.org/what_to_wear_to_formal_afternoon_wedding.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379974/normal_601e49849f0ae.pdfIn PDF document text
    • http://fitatuvepejozo.sportsontheweb.net/manibafutemekikuzapedu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luneruletiz.rf.gd/86804576673.pdfIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_45c5bda9d73049078af38ddb7b44fe4b.pdf?index=trueIn PDF document text
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_c85be308ce2242d89d775e0d2811e3f0.pdf?index=trueIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_a0eb03b4885d4196b0dca069af9d5192.pdf?index=trueIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_7cd491eddab54c7c80a04c26033ce886.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patotale/62669891687.pdfIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_d995bdd4025f4c4cabab3b32306790e6.pdf?index=trueIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_f63ab2b95c2b4df99f50626ba56ae509.pdf?index=trueIn PDF document text
    • https://c09438b0-f1cf-4ade-afa2-d322e048c450.filesusr.com/ugd/313cc6_27d91911876740068c6f0a53185720fe.pdf?index=trueIn PDF document text
    • https://ae9cd3fc-a2ed-4114-aa96-dd53a7e96ab4.filesusr.com/ugd/22cbe6_8f5f2aec476b472fafa2a3396ac4118a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lewuli/chrome_browser_free_64_bit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FC 3396 bytes
SHA-256: 9542a116d138b265c4882f9113d19e3c4f43916f31be220c94b7e8e87dc6e563
font_01_sfnt_off0000fe22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE22 4708 bytes
SHA-256: 8a57a675ba136e13d4fa2581167c05219674e93e6f242fb2fad520e63c1d073f
font_02_sfnt_off00010e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E35 10424 bytes
SHA-256: 9d5e8c01ca2cdd0dd67fd51eb08915faf6eb193ab3d78371267aa76cf90f86bb