Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4c7e0882e50d154…

MALICIOUS

PDF

68.7 KB Created: 2021-02-15 06:07:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a9c4ce431cc7bc74a6fa1bdb4c430be0 SHA-1: d76f5afc63afd73060c2ede0efd7967f139ba259 SHA-256: f4c7e0882e50d154cfd01743b31ef2f5e3fea03a4f6f4fb164fa4e325ba499f4
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://bologen.ru/wix?keyword=dead+trigger+hack+tool PDF link annotation
    • https://cdn.sqhk.co/fuwasokeg/a0jaicB/20120632202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414357/normal_6021c3f7545bd.pdfIn PDF document text
    • http://bestita.space/70080161272cdkig.pdfIn PDF document text
    • https://zorisurirumu.weebly.com/uploads/1/3/4/6/134600588/xilogir-dobaze-dezifomizoxafon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443801/normal_601e64ee3852f.pdfIn PDF document text
    • https://nibowivuxewanu.weebly.com/uploads/1/3/1/3/131379040/lerutomifuwor-winemodevu.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/PihJ1d5/homeadvisor_pro_membership_cost.pdfIn PDF document text
    • http://50offshop.pro/68712430381u5855.pdfIn PDF document text
    • https://jiwosanoxonu.weebly.com/uploads/1/3/5/2/135299962/1892796.pdfIn PDF document text
    • https://cdn.sqhk.co/widexerun/ia4hgge/wogepi.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/7300262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415051/normal_6026afa760af6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446507/normal_5fcc60bd7d25f.pdfIn PDF document text
    • https://cdn.sqhk.co/xagunetoxa/hi6Lnhg/online_multiplayer_shooting_games_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410731/normal_6012db1a899c5.pdfIn PDF document text
    • http://puveduxorapuba.iblogger.org/wuxozidezijubedorivuw.pdfIn PDF document text
    • http://vasuxarogaxatix.iblogger.org/nikesogeditabanawesux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381101/normal_5fc7d5338bb5a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogonuvusawi.epizy.com/hemophilia_in_the_royal_family_answers.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_off0000d153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD153 5088 bytes
SHA-256: 66b4e41dcf6b5196f7a6dea6afbe89bb7e9866c48d1027f130655e7ea79d6dd4
font_01_sfnt_off0000e2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A2 10248 bytes
SHA-256: 064a1fbb4d4a2cc65bddec68b3b3bc46e9199cbb934a46d203b55a272496e812

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