Malicious PDF — malware analysis report

Static analysis result for SHA-256 41216d25a0a6fe69…

MALICIOUS

PDF

72.1 KB Created: 2020-11-17 00:07:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3ee2f2ddc1c327688a52f3cba3b94a8 SHA-1: 64fdb666d62f778eaf6a338d3354f2f20ad6fe2b SHA-256: 41216d25a0a6fe69cc004928b4af3d926f6710bf88e2d0adebb796649add5e0c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, flagged as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users to potentially harmful websites. The primary URL, 'https://traffine.ru/strik?utm_term=sims+4+curly+hair+download', indicates a lure related to game downloads. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/strik?utm_term=sims+4+curly+hair+download
    • https://jajivinejide.weebly.com/uploads/1/3/4/3/134354145/vulevujalokajel-binudetofagizu-wubaregagome-tuvoforuzatas.pdf
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/muxigadodivog.pdf
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/litamagul.pdf
    • https://mogoribomos.weebly.com/uploads/1/3/4/2/134266362/c414f17ab.pdf
    • https://durabaseduxoj.weebly.com/uploads/1/3/4/2/134235759/5512475.pdf
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/fabax_jezobazop_rodex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3658aff7-cb8c-4085-8c7b-0e8d781adc33/jokejupor.pdf
    • https://s3.amazonaws.com/memul/lumazowemawozegoxivem.pdf
    • https://s3.amazonaws.com/jikopot/vis_wax_rs3.pdf
    • https://s3.amazonaws.com/fosalizuzu/30033459215.pdf
    • https://s3.amazonaws.com/tesotiwapax/55638123714.pdf
    • https://s3.amazonaws.com/dudurat/adownloader_app_fire_tablet.pdf
    • https://s3.amazonaws.com/warapagefasovi/2003_hyundai_elantra_manual_transmission.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_off0000dda4.bin
548b4f6f9aaccdc2899ba63ecad98936234ad7378e1a4bba3150a019f1a6826c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA4 5564 bytes
font_01_sfnt_off0000f07e.bin
eb45ebfca7f02b1c120a4261cac6305f59132627c6c7d817793d95da49701b1d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF07E 10436 bytes