PDF malware analysis — malicious · 0f6f0ad54a092cb9

MALICIOUS

PDF

69.5 KB Created: 2020-12-26 16:39:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 123469c021da586f5212236cc5d0da44 SHA-1: ee8d7f268e8d504a349c9b746fe0259fb0fd60c7 SHA-256: 0f6f0ad54a092cb9feda071faa5bcffd6f2e92f8ebb2d02f3767f42234239cf3

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://trafffi.ru/123?utm_term=hdx+8000+manual', which is highly suspicious. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, potentially for phishing lures. No scripts were extracted, but the presence of a malicious URL and the document's classification strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 4

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://trafffi.ru/123?utm_term=hdx+8000+manual
- https://cdn-cms.f-static.net/uploads/4474727/normal_5fbd062fda178.pdf
- https://cdn-cms.f-static.net/uploads/4366344/normal_5f91240eda905.pdf
- https://lozusometuzasop.weebly.com/uploads/1/3/4/7/134741376/6439897.pdf
- https://cdn.sqhk.co/masamiwe/Hjbgcje/sogonasafixasokoro.pdf
- https://cdn.sqhk.co/vekasurox/ge3iagj/cheap_island_for_sale_canada.pdf
- https://cdn-cms.f-static.net/uploads/4366676/normal_5f9d7866cf2eb.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://s3.amazonaws.com/jojitagifuva/elasticity_and_anelasticity_of_metals.pdf
- https://uploads.strikinglycdn.com/files/d3bbc7b3-ee61-455e-b957-b14c34060de8/silikeneso.pdf
- https://s3.amazonaws.com/gavexilatuvitaz/32270535044.pdf
- https://s3.amazonaws.com/fadedosi/quickbooks_2019_link.pdf
- https://uploads.strikinglycdn.com/files/80acd7ec-d13f-4c55-917f-08ae33889902/full_stack_developer_resume_objective.pdf
- https://s3.amazonaws.com/ratixifo/renaissance_art_and_architecture.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c998.bin` `6550028549add1901e377370a29cb2d08a43387213ae828c01213d05a5eb74b2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC998	4588 bytes
`font_01_sfnt_off0000d8f9.bin` `cda39c3d3d54e18d6a7f5513e3e00cab029e09a95ccf56608932ac4e63ef2e9d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8F9	10232 bytes
`font_02_sfnt_off0000fb6f.bin` `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB6F	4324 bytes

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