Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b171088c1a48adc…

MALICIOUS

PDF

74.9 KB Created: 2021-05-08 20:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee2ffcc7a74f5104e4b3e05d2f96cf9c SHA-1: b3af04a45dd81b390733f45f2d696e3914c2818e SHA-256: 6b171088c1a48adc3e979648a7e849ac9e87ee1988b537bd188d642428833a28
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites like 'vilenefex.ru' or 'gratoramaa.space'.

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://vilenefex.ru/strik?utm_term=epson+wf+7510+wifi+setup
    • http://gratoramaa.space/610193541410s7l6.pdf
    • https://cdn.sqhk.co/tavaxikanabu/hiD0hf9/86039708947.pdf
    • http://canlisohbetim.net/seralezibezasinofakaohi39.pdf
    • https://bazajiwudimikot.weebly.com/uploads/1/3/4/3/134344454/timawu-livumepulitofa.pdf
    • https://cdn.sqhk.co/tasokuxu/LiiQIib/xbox_series_s_target_audience.pdf
    • http://socialwave.me/bodaxenq3fji.pdf
    • https://gekaketiba.weebly.com/uploads/1/3/1/4/131455198/a1c19b.pdf
    • http://dithetsen.xyz/toyota_camry_le_2014_mpgx3r07.pdf
    • https://cdn.sqhk.co/moserusoba/dorhhge/download_striker_soccer_brazil_mod_apk.pdf
    • https://xatevixi.weebly.com/uploads/1/3/4/6/134651360/wegemovij_rawikokow_lumasulowiwiko_pamelira.pdf
    • https://jawejeletisib.weebly.com/uploads/1/3/4/8/134886371/3764552.pdf
    • https://xatevixi.weebly.com/uploads/1/3/4/6/134651360/8199975.pdf
    • http://inmyshtangen.xyz/vakudesumewezdon5v.pdf
    • https://jikevisanudopud.weebly.com/uploads/1/3/4/0/134017539/219a45349c522.pdf
    • https://cdn.sqhk.co/wetotuluxe/fibSOid/ralutigexibaxanoke.pdf
    • https://cdn.sqhk.co/fipimomozuk/HgW9dhd/lupegajabimuneji.pdf
    • https://cdn.sqhk.co/fapolokid/hfRKfji/piano_melody_fl_studio_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/12ca8722-4160-4510-a734-f3625027ee47/mi_gente_translation_english_spanish_dictionary_reverso.pdf
    • https://uploads.strikinglycdn.com/files/4eec81c4-cdbb-4924-a475-2dae1da8455f/zepuwur.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_off0000e93d.bin
a96e364086b000f83e8090bc188ae7b14f640247817cf3dcc4c3ae91e3b20ba9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE93D 5004 bytes
font_01_sfnt_off0000fa8d.bin
591f6f993ab7405d1bd8282077cca39898e88b1bb506eca02c7d8def8b79d279		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8D 10556 bytes

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