Malicious PDF — malware analysis report

Static analysis result for SHA-256 d613b2bc18970522…

MALICIOUS

PDF

73.6 KB Created: 2021-04-03 22:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3623b9ec5b56ffdd07d01e9607ebe8b8 SHA-1: 4e64b97817fa70dd947a91affeaa8aaf52da82ba SHA-256: d613b2bc1897052235861d8e2a8b6f707efda434bf8e75d5ec131a8d63406554
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged as a link farm, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6727

Heuristics 4

  • 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
  • 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://seumenha.ru/award?keyword=free+bachelorette+party+games+pdf
    • http://poposiruta.mywebcommunity.org/kaxotegowaduz.pdf
    • https://felogenapugiro.weebly.com/uploads/1/3/5/3/135327705/c3819a08c6d.pdf
    • https://cdn-cms.f-static.net/uploads/4478378/normal_604f7bba941fd.pdf
    • https://cdn-cms.f-static.net/uploads/4375350/normal_6043239849956.pdf
    • http://sopugepibimel.mypressonline.com/182132235.pdf
    • https://cdn-cms.f-static.net/uploads/4367905/normal_60133497b9066.pdf
    • https://suwisabinupa.weebly.com/uploads/1/3/5/3/135351097/lovawanaguwa.pdf
    • https://wavikifetin.weebly.com/uploads/1/3/4/9/134901048/gudonuruzepe.pdf
    • https://zozilevijuni.weebly.com/uploads/1/3/1/3/131383476/mibiz_pepevoragul.pdf
    • http://zeruxejobimal.mywebcommunity.org/what_size_turkey_fits_in_a_18_quart_roaster.pdf
    • http://loduwij.scienceontheweb.net/how_long_does_it_take_to_become_a_vet_tech_in_florida.pdf
    • https://cdn-cms.f-static.net/uploads/4499285/normal_600cb7692ed4e.pdf
    • http://tarekupi.scienceontheweb.net/vegepenubufubodaf.pdf
    • http://bapadama.medianewsonline.com/gibubakexejav.pdf
    • https://cdn-cms.f-static.net/uploads/4453906/normal_604dc1a928df0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/toliwudalamem/72029577809.pdf
    • https://s3.amazonaws.com/tozaduliwubega/95159980429.pdf
    • http://nopawalaxuwaw.onlinewebshop.net/kibivavaros.pdf
    • https://b6086c54-8ef4-40f3-ba18-bbbb993b339e.filesusr.com/ugd/36e927_56add7384c5348ba81290fc897e5009f.pdf?index=true
    • http://bipegokatif.onlinewebshop.net/xujulagabixufupadopubov.pdf
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_23f3c6e1316d406795c61e5ff546da15.pdf?index=true
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_506689dc4eb543b78c279567600f910e.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec6b.bin
4f87de661bae482077bcb96844859a5225de3b22429af204039741c36680e6cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6B 5400 bytes
font_01_sfnt_off0000fecb.bin
7aab32f6242b496bb10374140eeecdace5e39240a89b06a3e1324bd1f1deece5
pdf-font-stream PDF embedded font (sfnt) at offset 0xFECB 11004 bytes