Malicious PDF — malware analysis report

Static analysis result for SHA-256 c79d8c05160ebae5…

MALICIOUS

PDF

62.8 KB Created: 2020-12-25 21:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 525c94a41b072739787a0d371a0f7f31 SHA-1: 5e4fb344460834c3095f6ec0ef67ecd017120e09 SHA-256: c79d8c05160ebae53ca4a9b0b8bd9cf5404496d039e1f2d5ffb5c9302c402659
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. One of the primary URLs, 'https://traffking.ru/strik?utm_term=slice+of+heaven+putnam+ct', is flagged as suspicious. The presence of embedded URLs and a high ML score further support the malicious classification. No scripts were extracted, but the structure and linked URLs indicate a phishing or malicious redirection 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/strik?utm_term=slice+of+heaven+putnam+ct
    • https://cdn-cms.f-static.net/uploads/4470220/normal_5fb6b3758696d.pdf
    • https://gadufekovofu.weebly.com/uploads/1/3/4/7/134764592/d2675.pdf
    • https://mawajajapok.weebly.com/uploads/1/3/4/3/134353668/5414231.pdf
    • https://lifulufo.weebly.com/uploads/1/3/1/3/131379971/wimujaxemudat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gurupixabogivaz/videfupujiniki.pdf
    • https://s3.amazonaws.com/lakujusitejojet/74289947209.pdf
    • https://s3.amazonaws.com/mesixadelomomo/border_movie_song_bestwap.pdf
    • https://s3.amazonaws.com/bupijila/feximitur.pdf
    • https://s3.amazonaws.com/tezofuretejom/23471841856.pdf
    • https://s3.amazonaws.com/mejados/justin_timberlake_movies_2020.pdf
    • https://s3.amazonaws.com/bajuse/ballet_performances_nyc.pdf
    • https://s3.amazonaws.com/jolufozo/15343952447.pdf
    • https://s3.amazonaws.com/jedaxopopuko/38433680660.pdf
    • https://s3.amazonaws.com/zugutixe/2005_scion_xb_manual_transmission_capacity.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_off0000b986.bin
31756dfa4cacc5171b838574d8e04311ef33c0c60cb0fb25b2226e38ff9155c4
pdf-font-stream PDF embedded font (sfnt) at offset 0xB986 5144 bytes
font_01_sfnt_off0000caf7.bin
76d26b05450566d282bd1009906b1933d489a82b4ba59b77fb49642dbe980d33
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF7 10484 bytes