Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52145cd2b572084…

MALICIOUS

PDF

69.1 KB Created: 2021-01-12 07:03:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d13b9828f41b80ddb55f2e0be5501fb9 SHA-1: 3db4763bf4850496b8b88fb54b7a8cc738df9d2a SHA-256: a52145cd2b5720843f3519d6635f88c374ffb4490c0ecc817381ab65249b7b75
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/wb?keyword=entertainment%20book%20customer%20service%20phone%20number PDF link annotation
    • https://cdn.sqhk.co/mutobudenit/ggjbEid/mountain_climber_machine_calories.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/7xk9K8K/dial_911_simulator_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/jglfghH/wifi_file_transfer_pro_apk_uptodown.pdfIn PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/xutiravemalunuf.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/heggNgc/5975051279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403421/normal_5fbbf5b29978e.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/ifJC4kq/double_line_2_player_games_online.pdfIn PDF document text
    • https://cdn.sqhk.co/bavomizobe/hhijjic/house_life_3d_download_apk.pdfIn PDF document text
    • https://sawuwirepugasup.weebly.com/uploads/1/3/0/9/130969548/cca11.pdfIn PDF document text
    • https://wopopodixela.weebly.com/uploads/1/3/0/9/130969383/c8d46aa.pdfIn PDF document text
    • https://site-1168348.mozfiles.com/files/1168348/nostalgia_ultra_not_on_spotify.pdfIn PDF document text
    • https://cdn.sqhk.co/gafokoru/fbieGW5/how_to_connect_super_car_racing_multiplayer.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/kNwhjY1/jiffy_lube_chicago_il_60631.pdfIn PDF document text
    • https://wojawodexof.weebly.com/uploads/1/3/4/6/134673733/e30c8b87e6a89.pdfIn PDF document text
    • https://site-1168170.mozfiles.com/files/1168170/92856652931.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD245 5364 bytes
SHA-256: e8534c42d991e221c0e1872ebc6920b9db3336ffa71bdf507fcca94c7420d096
font_01_sfnt_off0000e45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45C 10264 bytes
SHA-256: f7f0ad815225818ed3c384f9fa5d41694d3a711ebb4dcfc47f8147ea67dfa509

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