Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be7ecd8c678e4a9…

MALICIOUS

PDF

64.5 KB Created: 2020-11-13 12:20:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10e74d2191d117c54f2c90d0537eb0fc SHA-1: 10412a54a6bd7844a7105ee4dae71ec5b9251cd9 SHA-256: 1be7ecd8c678e4a93657bdfb3040df3e40c34fa512c876013dd84ecf29748d0a
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic firing for PDF_SEO_LINK_FARM indicating a link farm. One of the primary URLs, https://traffking.ru/strik?utm_term=my+brother+charlie+summary, is likely a phishing or malicious landing page. The ClamAV detection and ML classifier further support its malicious nature, suggesting it's a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8125

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://traffking.ru/strik?utm_term=my+brother+charlie+summary
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/pepemedem.pdf
    • https://datirelegewewat.weebly.com/uploads/1/3/4/3/134329883/kudidit_voxujegimesopi_tajadimuwurin_vekim.pdf
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f89fb6bc3432.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wanasuvedigo/concert_review_samples.pdf
    • https://uploads.strikinglycdn.com/files/fc277e6f-2c5d-4a36-bb6f-310f00bda6cf/lukaroresoxesogiguk.pdf
    • https://s3.amazonaws.com/wazorixekunafob/15310784506.pdf
    • https://s3.amazonaws.com/piwanisaj/paliduropezaxedipowur.pdf
    • https://s3.amazonaws.com/wizuluworafid/ib_extended_essay_psychology_example.pdf
    • https://s3.amazonaws.com/perurulexi/samsung_phones_galaxy_s8.pdf
    • https://uploads.strikinglycdn.com/files/4041053a-d40e-4182-91bf-247d8c81f094/kazamew.pdf
    • https://s3.amazonaws.com/sixenogafopoj/bemoxewivegedojanabelujal.pdf
    • https://s3.amazonaws.com/gadumagabusodel/96864970639.pdf
    • https://s3.amazonaws.com/nisoxow/chspsc_claims_administrator.pdf
    • https://s3.amazonaws.com/xajowu/minecraft_pe_apk_aptoide.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d657.bin
591ff9950cb82a35a8c446b722abd56a79574ca41a8aacc6498eead3f5954958		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD657 5060 bytes

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