Malicious PDF — malware analysis report

Static analysis result for SHA-256 972460204ec1aead…

MALICIOUS

PDF

75.8 KB Created: 2021-02-20 06:52:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 32e33d567bb844b2a36554935154a3e3 SHA-1: dd72ff13dc776528ae2f2a28a822bcdc007e62c8 SHA-256: 972460204ec1aead0e337dfb4231fb81baf38b7914650c53de378c8e3e8f83bb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to "one minute manager pdf archive", aiming to trick users into visiting the malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/strik?utm_term=one+minute+manager+pdf+archive PDF link annotation
    • http://clobuss.ru/rurifevizhq2rp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476780/normal_60036d767458a.pdfIn PDF document text
    • http://converstarget.ru/76933675987zf65k.pdfIn PDF document text
    • http://juilopkiretlo.ru/pokemon_gaia_walkthroughh9q25.pdfIn PDF document text
    • https://cdn.sqhk.co/belesobikezi/jbZz0mc/life_is_strange_games_in_order.pdfIn PDF document text
    • http://crubr.space/battle_squadron_amiga_manualf3dho.pdfIn PDF document text
    • http://5coupon.info/abbaigaru_cinema_telugu_lo_ingrm6sh.pdfIn PDF document text
    • http://vsedlyatebya.xyz/nujufizudasuvevasazopmn2zi.pdfIn PDF document text
    • http://ch-bewertung-2888.xyz/29622759246sfcwm.pdfIn PDF document text
    • https://cdn.sqhk.co/gabazumad/Qgjhi43/vanida.pdfIn PDF document text
    • https://cdn.sqhk.co/nudotunaza/qjih5ia/color_tunnel_2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/fenolisaredeselexidupaxun.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/matowukasebesadeno.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/23981129742.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA19 5448 bytes
SHA-256: a13964b605f6c402a4209a9cbba8e2052e483d68715eab56eb07f875de63e636
font_01_sfnt_off0000fc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC80 11208 bytes
SHA-256: 2bb9684c92cd1b5525b2e3a5f4e2297cd4ab7c8b86b4ad51571fb7de4ae3e056

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