Malicious PDF — malware analysis report

Static analysis result for SHA-256 347b3f9cbe9cc75c…

MALICIOUS

PDF

74.5 KB Created: 2021-06-09 13:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ecafc1d79972cafc79ec7cbf1789984 SHA-1: c2a6234a80ebced5e896950c390850a77b9a746e SHA-256: 347b3f9cbe9cc75cd4bd07a98c9e00ab562b40d0326cc27ed7dcaac153676146
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a large number of external links, many pointing to PDF files, suggesting a link farm designed to obscure the primary malicious URL. The primary URL appears to be a lure for downloading a GTA 5 setup executable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://queure.ru/pbw?utm_term=gta+5+free+download+for+mac+full+version+setup+exe
    • https://cdn-cms.f-static.net/uploads/4366385/normal_606a7eca80d61.pdf
    • https://cdn-cms.f-static.net/uploads/4459188/normal_600bfb046fa7a.pdf
    • https://mojiwisixireze.weebly.com/uploads/1/3/4/6/134615440/wivonajatip_gubisuzekasevi_bibutusivuke_kokuxoxemapegar.pdf
    • https://gabanifuvumot.weebly.com/uploads/1/3/4/5/134588994/2d924ddc39de.pdf
    • https://cdn-cms.f-static.net/uploads/4485579/normal_604360e929c4b.pdf
    • https://lavupujewefi.weebly.com/uploads/1/3/4/6/134631736/1603306.pdf
    • https://xipumimetadefol.weebly.com/uploads/1/3/4/3/134358687/230133aa675a6b0.pdf
    • https://static.s123-cdn-static.com/uploads/4417138/normal_5fe3c992b9eb8.pdf
    • https://watalixajine.weebly.com/uploads/1/3/4/6/134635748/vovoxanetofisaxo.pdf
    • https://bofeliwibetu.weebly.com/uploads/1/3/2/8/132814086/bavabef.pdf
    • https://cdn-cms.f-static.net/uploads/4391008/normal_604d122a2e02b.pdf
    • https://vamoketuvet.weebly.com/uploads/1/3/3/9/133999376/812498d.pdf
    • https://static.s123-cdn-static.com/uploads/4428083/normal_5ff099a8127f2.pdf
    • https://fonekukiko.weebly.com/uploads/1/3/5/3/135393218/a9a95c30.pdf
    • https://paruvinuj.weebly.com/uploads/1/3/5/9/135970142/4277b48b008510.pdf
    • https://kixakusafi.weebly.com/uploads/1/3/4/8/134891224/fasisobopixivaxora.pdf
    • https://mibuvenatevuwo.weebly.com/uploads/1/3/4/6/134607329/e9c8016.pdf
    • https://cdn-cms.f-static.net/uploads/4473064/normal_6068406be704b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rutarotovez.pbworks.com/f/we_wish_you_a_merry_christmas_piano_notes_free.pdf
    • http://siseraxoru.pbworks.com/f/orange_county_ca_ccw_good_cause_statement.pdf
    • http://pibadaro.pbworks.com/f/49074864765.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e36a.bin
4b5a017a9fec2edce4983818b8ea1f6cb26ab57eb5640b95f9c5cf1b0433070d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE36A 5676 bytes
font_01_sfnt_off0000f6cf.bin
8aba4c323b4be59f6779dfa1ff2d43fad8e81750ffc2b8f478e801f930e172e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CF 10468 bytes

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