Malicious PDF — malware analysis report

Static analysis result for SHA-256 1273784a5e773b88…

MALICIOUS

PDF

93.9 KB Created: 2021-05-21 22:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 620a80ed948ea5243b258cdf77cafa8d SHA-1: f6d0cac45cda6f8b894c953be846b8ddafed0ea7 SHA-256: 1273784a5e773b88bd19189df16ec2861ba717adae0c85acfe1c77a83929e286
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 pointing to Weebly hosted PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of embedded URLs and the heuristic firings strongly suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6286

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://zoguripan.weebly.com/uploads/1/3/1/0/131070442/faecd54ba6b.pdf
    • https://cdn-cms.f-static.net/uploads/4420239/normal_606d9fbae1589.pdf
    • https://cdn-cms.f-static.net/uploads/4390374/normal_5fd8239beea5e.pdf
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/kijunawugu_wuvadafixozijut_puridofujatus.pdf
    • https://jowewuxutezu.weebly.com/uploads/1/3/4/6/134632231/fekejopogeter_zaniseg_gubifop_jekategivuwegi.pdf
    • https://gisidamuxifa.weebly.com/uploads/1/3/0/7/130775495/6947127.pdf
    • https://cdn-cms.f-static.net/uploads/4410207/normal_60403bb7e9cc2.pdf
    • https://xaduregenotilok.weebly.com/uploads/1/3/4/7/134711203/dedaxutexoxi.pdf
    • https://cdn-cms.f-static.net/uploads/4426701/normal_6028e5b3e790f.pdf
    • https://cdn-cms.f-static.net/uploads/4388046/normal_602ae23150fa3.pdf
    • https://static.s123-cdn-static.com/uploads/4472766/normal_5fcc8618e49ea.pdf
    • https://cdn-cms.f-static.net/uploads/4493550/normal_601d4deb22f56.pdf
    • https://dotijude.weebly.com/uploads/1/3/0/7/130740148/6e3bfc0512a79.pdf
    • https://cdn-cms.f-static.net/uploads/4417137/normal_5fd0e92f4cae3.pdf
    • https://wikafifej.weebly.com/uploads/1/3/2/8/132815388/3514703.pdf
    • https://lajexupizad.weebly.com/uploads/1/3/0/7/130775806/lawojuxa.pdf
    • https://static.s123-cdn-static.com/uploads/4465701/normal_5ff9714b7ec5e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/wb/ENAH/~3/jJyWpsOf3IE/wb?keyword=what%20is%20inference%20in%20pragmatics%20with%20examples
    • https://s3.amazonaws.com/jokotaziweluge/cuales_son_los_primeros_sintomas_de_la_enfermedad_dela_gota.pdf
    • https://s3.amazonaws.com/xoferuzu/broncos_2019_schedule.pdf
    • https://uploads.strikinglycdn.com/files/bb86a8be-d040-45c7-9230-a4e2dffa4074/80410628444.pdf
    • https://uploads.strikinglycdn.com/files/5e0571ce-8687-438f-bc66-f14cd033ba19/quadrafire_santa_fe_insert.pdf
    • https://uploads.strikinglycdn.com/files/47123f93-b9eb-4aea-9796-a5076dba5918/bijeb.pdf
    • https://s3.amazonaws.com/juzowilipi/another_word_for_work_hard_4_letters.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014ffd.bin
9ce5d5281ac3a15d8db8c3c24f48b079dd8979bb451a5d3fd5d84b5729b88c19
pdf-font-stream PDF embedded font (sfnt) at offset 0x14FFD 5280 bytes