Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a7af3d4eaa7e9f…

MALICIOUS

PDF

74.8 KB Created: 2021-03-15 20:31:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 618901c2d81ed960066f4db4baed12f0 SHA-1: 54945e70a5f2bfadb9fb97c8a3cb814304f9fab5 SHA-256: e6a7af3d4eaa7e9f0f6e6ed6379f5730bb245d7289aa3a836e8aac2d63ca5a2a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 5

  • 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 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=managed+labor+solutions+colorado+phone+number PDF link annotation
    • http://experiment.website/984528018338djrb.pdfIn PDF document text
    • http://teenagetutor.online/what_is_early_bird_in_barbeque_nationfus1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493891/normal_602c4e70de2d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449998/normal_601de4a9c6d12.pdfIn PDF document text
    • http://sawedes.mywebcommunity.org/how_do_you_charge_a_noco_gb40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382973/normal_5fd6117ba1855.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463533/normal_603cb20cb98cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421767/normal_601a0527b3148.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379221/normal_6039283f55b8c.pdfIn PDF document text
    • http://aslixan.com/best_motion_offense_for_youth_basketballz4wm4.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/lic_company_profile_2020.pdfIn PDF document text
    • http://it50save.info/el_alquimista_free_downloadp211s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383138/normal_5ff92f16bffbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446762/normal_603d41f560f4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_600f23adcec11.pdfIn PDF document text
    • http://xemakaze.mywebcommunity.org/zufelu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388293/normal_5ff144b72b77f.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/gopuze/is_sora_and_shiro_in_no_game_no_life_zero.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/aalayamani_tamil_movie_hd.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_off0000e7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AD 5632 bytes
SHA-256: d4e4c0feec28929a0f7d909913d55752a44f428378d3a86c8ef59ffde51b7ef6
font_01_sfnt_off0000fab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB0 10292 bytes
SHA-256: 68d890ca2904f57ea46c71534b35e817c8f9f63d3b95a3cf4ace73703dae4bb7

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