Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a9c6eb131d722b…

MALICIOUS

PDF

61.0 KB Created: 2020-11-24 00:53:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2c6b051cca0afd47ed9e091939954e26 SHA-1: d348c8dc3e6c73b62ddd5b37e028bece3a916e3f SHA-256: 60a9c6eb131d722b1f5f991a932bcbcee8a76516ac138cdae56808ee58a39a70
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the PDF structure suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/strik?utm_term=dsm+saint+louis In PDF document text
    • https://vovikadu.weebly.com/uploads/1/3/4/5/134587732/aae14da85a099.pdfIn PDF document text
    • https://xinusikavafomi.weebly.com/uploads/1/3/4/3/134353784/d74aec361f5fb2.pdfIn PDF document text
    • https://lilawowawumoxo.weebly.com/uploads/1/3/1/4/131453384/37feb1186.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/kozokedesurowilebab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bokelur/84379840556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7385f9fb-05cc-41af-9a70-781699f49a76/orcs_must_die_unchained_heroes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2634fb9-7cb6-405b-9eb9-8085b7facc6c/zaxenizug.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/durubu.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/espn_games_kick_return.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98575618-cc02-4452-9932-df074794cda8/xarukinewuvijewabijufe.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/first_tattoo_ideas_men.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6359d16b-c295-43a0-a740-1f4ba0a17065/mapa_de_puerto_rico.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/baal_veer_episode_984.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_off0000b5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5DC 4736 bytes
SHA-256: 094a2ca2fccf09a57f0910c376871c82b86588275427d453bfb02585f5c39125
font_01_sfnt_off0000c5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E4 9888 bytes
SHA-256: 828e110912c900bd6ea4b56044f2e8181e7f14aaf84945e4e4a5b84a176bf174

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