Malicious PDF — malware analysis report

Static analysis result for SHA-256 d673afc826fdab0a…

MALICIOUS

PDF

76.6 KB Created: 2021-05-16 20:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8632cd018da09119adcac8b8bebd4070 SHA-1: 740d74f2ad14faf201414427aa018dd526e7db52 SHA-256: d673afc826fdab0a47afc79440a14885062cdcac0313ae92857c6f109441b54c
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://xajibur.ru/strik?utm_term=18+hp+briggs+and+stratton+engine+rebuild+kit PDF link annotation
    • https://cdn.sqhk.co/mobobelelu/NLghRie/zodexofenarabotenogufuv.pdfIn PDF document text
    • https://cdn.sqhk.co/zejegure/xBgcagj/42265048146.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403406/normal_604fc66876b76.pdfIn PDF document text
    • http://3-bureaureport.info/zalejexukinobajiman77d.pdfIn PDF document text
    • http://sport-stavki.fun/line_6_hx_stomp_vs_pod_gogfhn4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455916/normal_600601d706c1c.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/zji9hbL/warriors_of_fate_sprites.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379969/normal_601d052fc43dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393625/normal_5ff340bbbcff0.pdfIn PDF document text
    • https://cdn.sqhk.co/gilubibawi/jjjbOij/berodek.pdfIn PDF document text
    • http://mon-compte-cmb.best/tajixufevofe9zq.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/76947384903.pdfIn PDF document text
    • http://xozowilozoga.mywebcommunity.org/45378303299.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446374/normal_6006a7b05c087.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wowutuzineko.myartsonline.com/haunted_heartland.pdfIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_9a3a51449fbd47f4a8b2f8591cc45f5f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9ace349-6e66-47e1-8c58-faba3baea360/ginagimawagefipude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3ae5a27-d957-487b-a7ac-09b96922006c/60803224809.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2be45c1-76e5-496a-b19f-ed2b7c688a70/pisizurorikap.pdfIn PDF document text
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_7ab28b36f00f4ed1b4d2cb6e15ee454e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0579f626-4844-46fe-bcf8-ff2e768efbce/52906011687.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF08 5576 bytes
SHA-256: e559281e04267b5c95a05868b96e2450829c262af5780dba65f30068b158f07b
font_01_sfnt_off000101e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E8 10052 bytes
SHA-256: 67e356ab5506c4ce54367fbb352647119b1630d449773cc9af75037b3ef58e5b

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