Malicious PDF — malware analysis report

Static analysis result for SHA-256 0906000a658b4ce1…

MALICIOUS

PDF

76.1 KB Created: 2021-01-10 00:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: e69e3fa879b9752c7b847e703fa4ed34 SHA-1: ef90bbce4880a73d97065622eaef71aeff22b40a SHA-256: 0906000a658b4ce14a7d33cd5608d45ec6798b95bd9ec9892acf3b011e2b5ce3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many of which are dynamically generated and point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external links and the 'urgency lure' heuristic suggest the document is designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffi.ru/aws?utm_term=damage+to+cargo+report+sample PDF link annotation
    • https://site-1174796.mozfiles.com/files/1174796/high_volume_instrumental_ringtones_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5fa07cbfc3086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420776/normal_5f9ef3270d8c2.pdfIn PDF document text
    • https://xoruzokuvomo.weebly.com/uploads/1/3/1/0/131070888/ruzizafowevumek_gugasubomote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f993a026972c.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/Y5CgKag/castle_miner_z_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426085/normal_5fe77a8fc7815.pdfIn PDF document text
    • https://buwulikifem.weebly.com/uploads/1/3/4/5/134583505/vikupoviluzexupu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_5fa3a50db9a5a.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/lomogas/mopurukulorepiramuti.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/40285034254.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/vipitefaninezadikiwabik.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_off0000ed88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED88 5252 bytes
SHA-256: c0a002cf620b11e55c1c5924c905f79ef1c91f28fe7e38b5ffb873ac82b85eeb
font_01_sfnt_off0000ff55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF55 10940 bytes
SHA-256: 131c99c7f247f684ffafecab80c407d6f82deaae70d70b59e62309cedb6f3ddb

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