Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c54b9ed70c60c9…

MALICIOUS

PDF

76.8 KB Created: 2021-05-12 14:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0ba6436ffdecb0c916ff11dfb922592 SHA-1: e9f288fcfda51c6301ed38fd095959e978002f29 SHA-256: 60c54b9ed70c60c990ea841551af6d03542e85a274fb348862e9e7311b3e527d
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, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO spam operation. One of the primary external links is to 'nipisod.ru/strik', which is likely a malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://nipisod.ru/strik?utm_term=borg+warner+velvet+drive+oil+change
    • https://zalirojojates.weebly.com/uploads/1/3/4/6/134606979/lifomafidomuj_moxawudunuvubim_natokilujogile_wobetu.pdf
    • https://pijafure.weebly.com/uploads/1/3/4/4/134457855/3839ac58cb543fd.pdf
    • https://bipixexomalexu.weebly.com/uploads/1/3/4/3/134349320/jupenufo.pdf
    • https://wijuluvewez.weebly.com/uploads/1/3/1/4/131437378/wafedinobag.pdf
    • https://boripate.weebly.com/uploads/1/3/4/5/134590871/260921.pdf
    • https://wimavebitajiki.weebly.com/uploads/1/3/4/6/134609796/laxivid.pdf
    • https://lopuxewununoj.weebly.com/uploads/1/3/4/7/134748711/9bdddd8c23da88.pdf
    • https://sogitinavebifi.weebly.com/uploads/1/3/5/4/135400198/4311608.pdf
    • https://rojofasefimo.weebly.com/uploads/1/3/1/6/131636828/balowowix.pdf
    • https://zafapuguma.weebly.com/uploads/1/3/2/7/132712217/9576b40a1.pdf
    • https://selegisazo.weebly.com/uploads/1/3/5/3/135323244/pimuwob-tumereje.pdf
    • https://cdn.sqhk.co/kenujowemi/f71jdij/31437625872.pdf
    • https://kazerefe.weebly.com/uploads/1/3/1/0/131070627/a71df9d60c77020.pdf
    • https://cdn.sqhk.co/leporolino/gdiaieZ/descargar_car_mechanic_simulator_2020_para_pc.pdf
    • https://raxabebawozovi.weebly.com/uploads/1/3/4/3/134311701/9c3f8e2be8a790.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/murudute/super_sonic_cheeseburger_nutrition_facts.pdf
    • https://s3.amazonaws.com/wikurixobelu/panuj.pdf
    • https://s3.amazonaws.com/nawuvud/minuet_in_g_major_violin.pdf
    • https://s3.amazonaws.com/livivuvuwugeb/wexir.pdf
    • https://s3.amazonaws.com/salade/xajot.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.

FilenameKindSourceSize
font_00_sfnt_off0000e452.bin
229778d48b4d2c4ce71d05614ce70010bad531dd0d77df81f088768d373efe0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE452 5012 bytes
font_01_sfnt_off0000f563.bin
9c955c19ea99f0239c371f3b3a1c75d169abedb3a0eaeadf983465bd6af98c0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF563 10016 bytes
font_02_sfnt_off000117c3.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117C3 4324 bytes

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