Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0285a0261ac825…

MALICIOUS

PDF

81.6 KB Created: 2021-03-22 22:36:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0cafd30a014ae750fade1efc22e9b3ce SHA-1: d8f5aa002a56d7eec5454c4b615a3cda24286e24 SHA-256: 2c0285a0261ac8259eedb9ffeba9d04f39dae0507f656a65064a2a898f3b5571
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO spamming operation. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6575

Heuristics 4

  • 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 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://leonvi.ru/award?keyword=biocatalysis+in+green+chemistry+pdf PDF link annotation
    • https://dulodegusatoto.weebly.com/uploads/1/3/1/6/131636763/dipitap-bilegenoboxuto-sefuwefi-vofuvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393188/normal_6011d0f7eff02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454049/normal_5fdd32e13bc08.pdfIn PDF document text
    • https://pixadodo.weebly.com/uploads/1/3/2/7/132740612/kitunokurowemami.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478951/normal_5fedf21be8f85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464734/normal_5ffdd3bfede85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458848/normal_600bf0b280f57.pdfIn PDF document text
    • https://wirufaxiferid.weebly.com/uploads/1/3/4/5/134599318/xenipiwowob-nevamozalezuju-guxawibu-tewoxemoren.pdfIn PDF document text
    • https://tolejavufagus.weebly.com/uploads/1/3/1/4/131437822/5055320.pdfIn PDF document text
    • https://lipigilukezi.weebly.com/uploads/1/3/5/3/135347924/5024b26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_6057e29261e1c.pdfIn PDF document text
    • http://misstourist.info/98164919461uzmpg.pdfIn PDF document text
    • http://gdztut.com/180965430094amg3.pdfIn PDF document text
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/7940904284717.pdfIn PDF document text
    • https://volamajujidek.weebly.com/uploads/1/3/4/6/134667755/zapan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490365/normal_5fe59bf56e3b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417414/normal_6001566e6505a.pdfIn PDF document text
    • https://gexuganogos.weebly.com/uploads/1/3/0/8/130813630/gunubitibosimox-nifak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377109/normal_5fed9c5628a3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376606/normal_600257def285b.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/gofilafixu/intermediate_reading_path_builder_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/gubonasusexujetetik.pdfIn 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_off00010402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10402 5508 bytes
SHA-256: 624af6e986f795e2fca8af437a758dd6a4189606290c3c2e063ad942462e6eea
font_01_sfnt_off0001168a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168A 11096 bytes
SHA-256: f3a831dc1c4a844187a840462ed26f8fccaa56165f5261ccc36c16683c69e28f

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