Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6064d7a0129c70e…

MALICIOUS

PDF

75.3 KB Created: 2020-11-19 08:40:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9989373cf4efc3568ff099b6c2d62b7d SHA-1: cbc3cb1422906195a0e5aa253b4e0c668831ea3f SHA-256: e6064d7a0129c70e495e7b970faaf0d51311ccafd0ddf4fa77f0015cb2fc788d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous external links, including a link farm heuristic, suggesting it's intended to redirect users to potentially harmful websites. The primary URL observed is trafffe.ru, which is likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/123?utm_term=hp+pavilion+15-au063 PDF link annotation
    • https://sekojufakov.weebly.com/uploads/1/3/0/7/130776719/3a6f0aaba9c.pdfIn PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/1905fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383806/normal_5f9da3379b151.pdfIn PDF document text
    • https://pusobufuronuwu.weebly.com/uploads/1/3/4/4/134475569/9021225.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383586/normal_5fa75e848e998.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/870782f5-d264-4b59-b103-6cb1e2fbcb60/88361379055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99d8979d-9872-4766-86f0-265d9f7c252a/pegem_kpss_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/xefig.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/pufejezalunelefez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d64e2e-07b7-4db6-b81d-e5c782570b4a/54481355855.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/38825476092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0750ded-fbc5-4e6c-b7af-e3cc4936b79b/fodunutijuruv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f2f7d3c-e241-4998-b211-c688f9890c1c/74164448247.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97E 5228 bytes
SHA-256: 5eb9aec306c906d69d0039b03effd77c66759f6b9f9d422fd482ad064fb1b772
font_01_sfnt_off0000fb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB71 10832 bytes
SHA-256: d01dc7b662de4e4cf75266e3107ce8fa4fde835619a3484ea52841bd4209ee16

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