Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02f65b8d82bec58…

MALICIOUS

PDF

71.9 KB Created: 2021-05-03 21:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 633270126bf476e6cf56267125848795 SHA-1: 848da5f5b8005810fab290329704a6472ccf8961 SHA-256: e02f65b8d82bec582869c8be0940c5d5de2d62a46a8a4afa7993fff126408e0a
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 0.9996

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://zajinet.ru/strik?utm_term=avital+7345l+remote+programming PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394077/normal_604f742f4cc7f.pdfIn PDF document text
    • https://figowemepiwe.weebly.com/uploads/1/3/1/3/131398533/funoxovakawadi-wiwopumejuma.pdfIn PDF document text
    • http://lalabomujulimof.mywebcommunity.org/lagujukibegozele.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490920/normal_6027e798a8750.pdfIn PDF document text
    • https://wikumegi.weebly.com/uploads/1/3/1/4/131407968/vawenogewega.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455881/normal_6056e91b9d800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480878/normal_60636c76e88a8.pdfIn PDF document text
    • http://porizaritofo.mypressonline.com/nofexaxudidoremor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416805/normal_6010b2a07a1f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484805/normal_605ca2878005c.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/baby_girl_names_that_start_with_k_in_spanish.pdfIn PDF document text
    • http://tezibif.mygamesonline.org/possessive_nouns_quiz_grade_6.pdfIn PDF document text
    • http://tugokutuli.scienceontheweb.net/70445997263.pdfIn PDF document text
    • http://sopafekidis.sportsontheweb.net/offensive_security_certified_professional_download.pdfIn PDF document text
    • https://takibuvekinapix.weebly.com/uploads/1/3/4/4/134456834/jawulobovatux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_606df539893e0.pdfIn PDF document text
    • http://fopokigife.mywebcommunity.org/kinavofawamuvowesuw.pdfIn PDF document text
    • https://zapefanunu.weebly.com/uploads/1/3/4/8/134870690/7679248.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416654/normal_5ff7d91a25103.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481286/normal_5fcc0afc85fb2.pdfIn PDF document text
    • https://dajikapepexav.weebly.com/uploads/1/3/4/5/134597014/fewab_xetem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://noxumalog.onlinewebshop.net/nebexonesuvopajudoduvep.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_off0000ddd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD4 5464 bytes
SHA-256: a87ddb04f7e800dd54c25d6cf1ce1eec5149bbe86cbb477029c929777480eb1f
font_01_sfnt_off0000f072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF072 9972 bytes
SHA-256: d9f33eed3ca4bee4689467bc4f2f80b156ce642d9eee8e71c3df9b07206e4faf

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