Malicious PDF — malware analysis report

Static analysis result for SHA-256 898a8cc40199efc7…

MALICIOUS

PDF

84.6 KB Created: 2021-01-08 07:49:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 987a8307cb291af1d70304ac532c0501 SHA-1: 369d0a4e77a778fb161d71eaaa6abaf6f87af384 SHA-256: 898a8cc40199efc7e82619021a95816fb68c2d59d3e05d640a2dd5401cf485c7
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are part of a link farm, suggesting a malicious intent to redirect users. The heuristic 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly indicate malicious activity. The presence of embedded URLs and the ClamAV detection further support this assessment, pointing towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9391

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://trafftec.ru/aws?utm_term=british+english+conversation+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417305/normal_5fbabe7e6a6e5.pdfIn PDF document text
    • https://radelemetiwiwi.weebly.com/uploads/1/3/4/5/134520029/fixuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f86f42f6c975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418985/normal_5fbeeec97a60b.pdfIn PDF document text
    • https://lajutiruwogow.weebly.com/uploads/1/3/4/5/134585316/3660015.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469358/normal_5fe2b5d735f0f.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded0763f-9bf7-4239-995a-f35ca5fa0d75/44591543821.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/gta_v_xbox_money_glitch_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/36780188322.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/indoor_hdtv_antenna_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e780d18-63d2-4342-b6be-a3061d3f0506/1782311921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d8dd793-f283-4778-b236-f8173412e7ba/tatobekisubi.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/wolunuwibofopebix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c6e4bcd-4d7c-4fe4-a6b5-55979ead28d2/hobo_game_3.pdfIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

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