Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa467d051cc2a5b…

MALICIOUS

PDF

75.1 KB Created: 2021-04-04 12:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14f1c15bcb401a54932ce763665687d4 SHA-1: ddc49cc883d8ffba25f4e673a4503163d465dd2e SHA-256: ffa467d051cc2a5b846fc0f88ea495cb1b205cb5a28821297782529170f71113
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a malicious document designed to redirect users to potentially harmful sites.

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://dugedepap.ru/123?utm_term=articles+in+english+rules+pdf
    • https://cdn.sqhk.co/supekokabe/EjeJohd/rerirofebosogejola.pdf
    • https://nagagixibedixu.weebly.com/uploads/1/3/1/6/131606435/kavuwi.pdf
    • https://cdn-cms.f-static.net/uploads/4369648/normal_6029f0bd56289.pdf
    • https://diwamelebo.weebly.com/uploads/1/3/4/1/134108813/mojisexelepotajin.pdf
    • https://cdn-cms.f-static.net/uploads/4425933/normal_602edcd42c0a6.pdf
    • https://cdn.sqhk.co/nomelafu/doSlOha/40747961214.pdf
    • https://cdn.sqhk.co/givesaxi/akgi4ji/35630496014.pdf
    • https://static.s123-cdn-static.com/uploads/4374978/normal_6001e3e7a94a8.pdf
    • https://cdn-cms.f-static.net/uploads/4403952/normal_605fd90de088d.pdf
    • https://cdn.sqhk.co/loganidob/hbkggia/top_wilderness_survival_shows.pdf
    • https://cdn.sqhk.co/dujujema/Kbshhgn/brhe_berry_baby.pdf
    • https://cdn.sqhk.co/pesenexur/ceYxwib/titunuzeme.pdf
    • https://static.s123-cdn-static.com/uploads/4470685/normal_5ff24c3de6755.pdf
    • https://jakikoxu.weebly.com/uploads/1/3/1/4/131411542/dajamuginoluma.pdf
    • https://static.s123-cdn-static.com/uploads/4415767/normal_5fca2c26d4930.pdf
    • https://static.s123-cdn-static.com/uploads/4415937/normal_5fe2bf9e7060d.pdf
    • https://cdn-cms.f-static.net/uploads/4490367/normal_603d435af0439.pdf
    • https://pibigetikuke.weebly.com/uploads/1/3/5/3/135387636/6357480.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wijekup.epizy.com/3207849499.pdf
    • http://webewizago.epizy.com/pilot_aptitude_test.pdf
    • http://nawatelobuj.rf.gd/popibovo.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_off0000e90f.bin
e020211f4dca98bec3adb0ce288be11d50eead438da6a4bba0a7baa439de49aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE90F 5196 bytes
font_01_sfnt_off0000fabc.bin
c6152692a07647a7bc9d2770429391748308f003dccce10b64e59e4f0e93a107		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFABC 10556 bytes

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