Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf01ea178c9d17cb…

MALICIOUS

PDF

64.9 KB Created: 2020-11-26 08:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db833b53200d1c3437cac4369bf60db5 SHA-1: 7927e353c490032234821c6b31cfa98a0935670b SHA-256: bf01ea178c9d17cb61c8c67e91f083ab27c4c0139e192ee600015b389ada0e53
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to potentially malicious domains, suggesting it's part of a link farm or SEO scam. One of the primary external URIs, 'https://traffnew.ru/strik?utm_term=mariposa+med+spa', is a strong indicator of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/strik?utm_term=mariposa+med+spa
    • https://cdn-cms.f-static.net/uploads/4403673/normal_5fa5ff6c5361d.pdf
    • https://cdn-cms.f-static.net/uploads/4489028/normal_5fbd91ea9f085.pdf
    • https://moxetutatag.weebly.com/uploads/1/3/4/2/134234950/7632704.pdf
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f872387f1399.pdf
    • https://vifesomojijafi.weebly.com/uploads/1/3/4/3/134337648/guzalokiku-dafoba-bepavezaduzuv-vemojoruxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f40553bb-7495-4223-b638-ebd852205df6/vejifigim.pdf
    • https://s3.amazonaws.com/gumegulaxi/gimexixupopujitapamesejin.pdf
    • https://s3.amazonaws.com/satedafadusizo/wilamokubu.pdf
    • https://s3.amazonaws.com/zoromexemuzid/85291673560.pdf
    • https://s3.amazonaws.com/povelenavuviw/clinical_anesthesia_barash_free.pdf
    • https://uploads.strikinglycdn.com/files/dbd07fd9-6324-4d83-8f35-7c17cb233794/12359932206.pdf
    • https://s3.amazonaws.com/dowavelaxam/67874083890.pdf
    • https://s3.amazonaws.com/potamotaz/gezuzasamakixasixugaj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c271.bin
096eb3ee45fdb08f968a49191f5af4f6289b483349bfafbd3298c8007e14a174
pdf-font-stream PDF embedded font (sfnt) at offset 0xC271 5080 bytes
font_01_sfnt_off0000d3a8.bin
6fbe6b63be2b3d1ab35c18e67c591bdf9207ad2699aa7eed1b50b34876d980cb
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A8 10620 bytes