Malicious PDF — malware analysis report

Static analysis result for SHA-256 8df97e166d446be4…

MALICIOUS

PDF

56.7 KB Created: 2021-05-24 23:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 2b160e2abdeea8663c655bf51e77c067 SHA-1: 8535824ec91b71b21c790d281f1941e45f8dbdaa SHA-256: 8df97e166d446be4301272770d2bbbdbbf632190ca521101ff2598e624c07e01
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' and another flagging an external URI. The ClamAV detection and ML classifier also indicate maliciousness. While no scripts were extracted, the presence of external links suggests a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8918

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://jottigo.ru/strik?utm_term=full+and+final+payment+letter+sample PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481170/normal_5fd67bf923155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402478/normal_6021c050869ff.pdfIn PDF document text
    • https://tefizaset.weebly.com/uploads/1/3/4/5/134587169/9018339.pdfIn PDF document text
    • https://lunidopufakim.weebly.com/uploads/1/3/4/4/134482460/butufoduninebakode.pdfIn PDF document text
    • https://nixitemolepof.weebly.com/uploads/1/3/4/8/134870129/nizivi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449600/normal_606798b2ab147.pdfIn PDF document text
    • https://bevoparekev.weebly.com/uploads/1/3/4/0/134018333/vapax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450635/normal_60016b0a58ca1.pdfIn PDF document text
    • https://latiniwujuxemuw.weebly.com/uploads/1/3/3/9/133997677/xoxozuboliwolimedop.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/kefelofukavuvufor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01e0578a-74b7-419e-98fd-2bd14ede6d3d/how_much_is_my_2014_mazda_3_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/kabokej.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/59767166739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1a0e723-de01-4da7-bd98-a808fc522a88/how_to_scan_baofeng.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/cheek_to_cheek_fred_astaire_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/agriculture_science_and_technology_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa548668-ed92-4bc9-8ea0-b232e7eb2140/nirebod.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/3374632459.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/15434703514.pdfIn PDF document text

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