Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ac97840aaa0665…

MALICIOUS

PDF

77.3 KB Created: 2021-04-05 17:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dcc0b13a498224b224a7913d77498a8a SHA-1: cf6a1ecce9a51a9977e7167ba5a948c052a59300 SHA-256: f3ac97840aaa066588b0e3647880ea1ad9fff83a4458855f68bc404335e08bfd
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 0.9991

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/award?keyword=wings+of+fire+book+3+free+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405674/normal_5fd1d0d39affa.pdfIn PDF document text
    • http://naturebiolog.fun/neselokigevabakeltcaqf.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/hflhcjg/word_borders_templates_free.pdfIn PDF document text
    • http://theplafond.xyz/vitaduwby3h9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420752/normal_5fff793bc848c.pdfIn PDF document text
    • http://afracheat2.xyz/337459738964hh70.pdfIn PDF document text
    • http://sodofuwaxidida.22web.org/acceleration_formulas_physics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419430/normal_6016caa21f31d.pdfIn PDF document text
    • http://kindraretterath.com/4691807356479fgk.pdfIn PDF document text
    • https://cdn.sqhk.co/kudewigi/hgsdoib/93765254202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_602d6358187ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_602702410e462.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/mejados/1997_dt466e_specs.pdfIn PDF document text
    • http://xusijaxux.rf.gd/wigev.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/19170700803.pdfIn PDF document text
    • http://medemamonolusav.rf.gd/kowimomasajeseridosine.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/indiana_gov_bmv_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/95646650676.pdfIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_f8a4bbc98e0c472181b5dd4d5361edfd.pdf?index=trueIn PDF document text
    • http://jojajixinoxu.epizy.com/16527659923.pdfIn PDF document text
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_3951e616c35b4ca28758ceba0e870d06.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/fakebook_facebook_template.pdfIn PDF document text
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_cf8a66b6d28a4c25a992939f8cfd05a9.pdf?index=trueIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_7145910058714bed9a6bedbe0df577d4.pdf?index=trueIn PDF document text
    • http://kiwejolota.rf.gd/75200840168.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_off0000ef24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF24 5348 bytes
SHA-256: 421e286724f386b228219fdb39223a57cd51dea7dae710df1929ac4ce902c2f6
font_01_sfnt_off0001017c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017C 10804 bytes
SHA-256: 81655c28b31b3e13b1ea44d1497fb8ccc962928ee3ab416d298075d20574f7bb

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