Malicious PDF — malware analysis report

Static analysis result for SHA-256 12fe4527dc9d41c6…

MALICIOUS

PDF

76.5 KB Created: 2021-02-22 19:23:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c6f3d376f2b8fa284db048bd072af2a4 SHA-1: 82bd93035ea5cc9c4a3a586f71c7a034d4728ecf SHA-256: 12fe4527dc9d41c6258981c7b7e8a58f9bfbcc708360013abad56c4fe60659d8
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/123?utm_term=how+to+install+panasonic+cordless+phone PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476453/normal_5fec21379a4fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420222/normal_5ff2e3d4c68d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462352/normal_6012131dad50a.pdfIn PDF document text
    • https://lepafelazaxi.weebly.com/uploads/1/3/1/1/131164007/28134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454968/normal_602f82009a063.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418368/normal_5fe420bb6e336.pdfIn PDF document text
    • http://businesslinecenter.com/regedoten2jbin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_600fb00ca87b3.pdfIn PDF document text
    • https://cdn.sqhk.co/lixozimiz/J3gihge/rupuronekosiw.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/ieUc29Z/virtual_family_game_night_on_zoom.pdfIn PDF document text
    • https://ruzopujiwinor.weebly.com/uploads/1/3/1/4/131452977/5112657.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417046/normal_5fda1d4ea499a.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/cieelGu/pc_games_to_play_when_bored.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/ggcwja6/bdo_reload_easytrip.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/jmgehjd/programming_languages_for_website_development.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_off0000ed01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED01 5212 bytes
SHA-256: b75a88a9ce16d04c68ffc030d9f5e6bae30d08c881d7f786eb43d39b82a0b874
font_01_sfnt_off0000febf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBF 11276 bytes
SHA-256: fd73703569e6e5d9cab881e41d4f663984a87dae52a907805c2f0566b4d1ce1d

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