Malicious PDF — malware analysis report

Static analysis result for SHA-256 44da6da813966f73…

MALICIOUS

PDF

64.9 KB Created: 2020-11-22 13:44:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0bbb8137cd7cb0caf92ba9a160c54cfd SHA-1: 17773b09eff3f1e781dd41f6c85d58275b0f81bd SHA-256: 44da6da813966f73fc526069d5bd8a52b397b97b313b90dd27601e5c811ed38a
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains numerous external links, with one pointing to 'trafffe.ru', a domain often associated with malicious activity. While no scripts were explicitly extracted, the PDF structure and the presence of external links strongly suggest an attempt to redirect users to potentially harmful content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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=metaphor+in+the+crucible PDF link annotation
    • https://kobuxomibusopi.weebly.com/uploads/1/3/4/6/134609859/renobanovixuk.pdfIn PDF document text
    • https://wilujogid.weebly.com/uploads/1/3/4/3/134347442/ripoponefafoxipe.pdfIn PDF document text
    • https://mexugagerow.weebly.com/uploads/1/3/4/4/134482965/sajujuboramodu-texoboxefudu-fanudepaxorada-rakosuzuzetuje.pdfIn PDF document text
    • https://moxipilewuzeget.weebly.com/uploads/1/3/4/3/134360433/727534.pdfIn PDF document text
    • https://labiduto.weebly.com/uploads/1/3/4/5/134584073/butiwakuwemikogata.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/f6fd24b2-94d9-4766-a617-0516b555c5c5/wubaxasunelopalaxuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19abbc0d-f516-44c2-8b75-eaefc01a5170/business_professional_ethics_for_directors_executives_accountants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9511b744-cf61-4416-8418-14f0c9c5a9af/la_ley_de_atraccion_libro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82bb5667-ddf9-4bba-a343-048003a2ac4a/vamos_de_polis_pelicula_completa_en.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a59faa5-3db9-4c9c-a875-f33f2dce5173/level_3_to_comp_cape_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ead512b2-3907-4e33-bf6b-575388d0d831/kasaloregifikatikeru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c163caaa-1faf-44bb-b26e-6d375d07f50d/91098192925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a00662c-cb9e-493b-8df7-60e81e7bec69/kejupo.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_off0000c4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B8 4988 bytes
SHA-256: 5b49847e700aad32782658763e1677e3635cc6cd1844a32eeb0473b1cacb4375
font_01_sfnt_off0000d5b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B1 9840 bytes
SHA-256: 7e679446a6d0067e62909c3ebdf68008e1648b17b393a94eddfd0be1feb7c460

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