Malicious PDF — malware analysis report

Static analysis result for SHA-256 b87585e20b951e59…

MALICIOUS

PDF

63.5 KB Created: 2020-12-20 00:45:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63288db67231e06ab1e22141d5a09bfa SHA-1: 19c5c4a81aa766fdcf703f5338fcdeb21bdc0f70 SHA-256: b87585e20b951e59fb82a602ce6f53cf1d117dab372bf8ec8237ea4845ba69c0
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior. One of the external URIs, 'https://trafftec.ru/strik?utm_term=sony+rmt-d187a+remote+codes', is suspicious and likely leads to a phishing or malware distribution site. No scripts were extracted, but the PDF structure itself indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8630

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/strik?utm_term=sony+rmt-d187a+remote+codes
    • https://cdn-cms.f-static.net/uploads/4418777/normal_5f9c37e788af6.pdf
    • https://tubemugipowiw.weebly.com/uploads/1/3/4/3/134345788/sugetip_ranol_jetubenuzafamo_baren.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/nidisetati.pdf
    • https://cdn-cms.f-static.net/uploads/4446400/normal_5fc2ee338a81e.pdf
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/fatafanutojor.pdf
    • https://tajekuludukomas.weebly.com/uploads/1/3/4/4/134498487/3d0e9b14.pdf
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/zisixuravesudevu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kodipopujufipig/kexomivesubotojojimer.pdf
    • https://uploads.strikinglycdn.com/files/73be274a-3825-4997-8ace-f444c6a700b7/kijanusulokuxeka.pdf
    • https://s3.amazonaws.com/bomifabipi/gosiwos.pdf
    • https://s3.amazonaws.com/remuv/girls_frontline_mod_apk_latest.pdf
    • https://s3.amazonaws.com/zuwimadaneb/riresiwomadiwiwarapisu.pdf
    • https://s3.amazonaws.com/sugaguxagu/11326199346.pdf
    • https://s3.amazonaws.com/wisuw/blank_yard_signs_staples.pdf
    • https://s3.amazonaws.com/welanisowari/57805527483.pdf
    • https://s3.amazonaws.com/rebomedug/xatunipapukaparogika.pdf
    • https://s3.amazonaws.com/dukajevo/cita_para_pasaporte_mexicano_mexicali.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4a6.bin
61409a34ac4b32aef1988317624867a52af029f13737c446761d4b2f551d06ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A6 5356 bytes

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