Malicious PDF — malware analysis report

Static analysis result for SHA-256 075791359d7025b0…

MALICIOUS

PDF

50.6 KB Created: 2021-01-14 07:06:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2210b80ff30918fedccd2552dcf727ff SHA-1: 7ca0643f6550e2b02ab3ee354fb1d55c4c26f562 SHA-256: 075791359d7025b0efb001965ae523701769b94c79ba2ba576a525bce9ffb88d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many pointing to Weebly and CDN domains, suggesting a link farm or redirection scheme. The presence of the 'PDF_SEO_LINK_FARM' heuristic and the ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'fixed asset management software', likely a lure to encourage users to click the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6781

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/aws?utm_term=fixed+asset+management+software+free PDF link annotation
    • https://febasenijig.weebly.com/uploads/1/3/1/3/131379808/goxatorarud-kadola-dasixopeji.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/gdohchg/zifanumulefuburala.pdfIn PDF document text
    • https://cdn.sqhk.co/kupodakojav/IXjfHjf/vimorab.pdfIn PDF document text
    • https://lefizedut.weebly.com/uploads/1/3/2/6/132681647/liwatoxozosu-zikugis-wisetuzepaza-gafunija.pdfIn PDF document text
    • https://cdn.sqhk.co/vizoxaxijojo/SjijsE3/webitizina.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/idhIFhh/77335001521.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/khe49XI/lobadufixalan.pdfIn PDF document text
    • https://mobugozuko.weebly.com/uploads/1/3/4/8/134869294/69cd8198d3feb4.pdfIn PDF document text
    • https://site-1176273.mozfiles.com/files/1176273/blockchain_wallet_with_1_btc.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/get-_healthreport_activesync._protocol_unhealthy.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/85289801039.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/onychia_of_toe_icd_10.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/35782608486.pdfIn PDF document text

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