Malicious PDF — malware analysis report

Static analysis result for SHA-256 30940190db5074af…

MALICIOUS

PDF

71.0 KB Created: 2021-02-20 10:41:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 580bccae66deaad9930e8343c6290ad2 SHA-1: fd32581f58759714295974fa3f3e23199a600717 SHA-256: 30940190db5074af33346486c57c5295e2e2144a48ed5869194e7a52ec2e76b4
154 Risk Score

Malware Insights

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

The file is a PDF containing a large number of external links, identified as a PDF link farm. The primary heuristic indicates a malicious ML classification, and ClamAV also detected it as a phishing trojan. The embedded URLs suggest a phishing or malicious content distribution scheme, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9668

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://seumenha.ru/strik?utm_term=25+nautical+knots+to+mph PDF link annotation
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/6082934.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483336/normal_5fff09f0b1ffb.pdfIn PDF document text
    • https://cdn.sqhk.co/ledodatefu/7iiDUhd/35112796078.pdfIn PDF document text
    • https://cdn.sqhk.co/xoguvamev/4gjAJhj/38976764378.pdfIn PDF document text
    • https://cdn.sqhk.co/tudosiki/2gdjbge/jebewutudiwet.pdfIn PDF document text
    • https://laropavo.weebly.com/uploads/1/3/4/5/134585926/katazejiwi.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/3pHcgcz/d-_day_movie_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/rifarako/7gghbih/pegofobolekis.pdfIn PDF document text
    • https://cdn.sqhk.co/pevelefotuve/I7AHhiO/es_parallel_accounts_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tosijoxopum/SDjePvJ/40404803977.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475565/normal_5fefa478b6382.pdfIn PDF document text
    • https://gonotelavekufuf.weebly.com/uploads/1/3/4/6/134615299/sogewogob.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/jiRuifj/degamodaroxodusupa.pdfIn PDF document text
    • http://gufutaca6.xyz/dell_laptop_black_friday_deals_best_buy7sl70.pdfIn PDF document text
    • https://cdn.sqhk.co/xodakebebit/ibjbJ6S/76525483363.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/U6JEwge/wazevojetu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF104 5300 bytes
SHA-256: b1c65ef5a872ee1a872eec19e26e190901aa87bec10cd1bae356b71a744bd602

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