Malicious PDF — malware analysis report

Static analysis result for SHA-256 c49b44b9a9ca7a85…

MALICIOUS

PDF

75.4 KB Created: 2021-02-01 09:29:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e6162721cb909c66bb7749d63efc4934 SHA-1: d75136f35b9c8b8cee3873fbc743aa3b724bd436 SHA-256: c49b44b9a9ca7a859e56af191d8b2daf8cccf504dfcdd164c5bf3298c703cc7e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://jacksth.ru/123?utm_term=nti+2020+ann+arbor PDF link annotation
    • https://jerefukixuludew.weebly.com/uploads/1/3/4/6/134686450/5254156.pdfIn PDF document text
    • http://fsbsiod.com/cecilia_marfo_worship_mixp8g94.pdfIn PDF document text
    • http://brandframeb.com/subway_endless_run_game_onlinep5ddc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454435/normal_60004e942b088.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/rawomujuwefobojoldfrqz.pdfIn PDF document text
    • http://talkme-news.info/fractions_diagnostic_test3hjho.pdfIn PDF document text
    • https://sufudoni.weebly.com/uploads/1/3/4/8/134853368/d1bd78013190a81.pdfIn PDF document text
    • https://rolavakewuxilo.weebly.com/uploads/1/3/1/4/131407047/rafisijebese-jejugep.pdfIn PDF document text
    • http://marketitaly.info/2009_nfl_standings_espnxrdz4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445107/normal_5fdd18488b5d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451049/normal_5ffe274837641.pdfIn PDF document text
    • https://lamipakowoj.weebly.com/uploads/1/3/2/8/132814468/jigino-movirofenujo-tinamosanutugit-gazububozunub.pdfIn PDF document text
    • http://acupofjacob.com/dragon_quest_builders_2_room_guidei8ssi.pdfIn PDF document text
    • https://cdn.sqhk.co/bonosexov/aqhejaQ/85468859969.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370092/normal_5fc596ff90156.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_off0000ebab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAB 4852 bytes
SHA-256: b4ef91a02b9439b563a9162d6058f0d26ed3b85f50874407f36b6f0b4b46107c
font_01_sfnt_off0000fc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC39 10916 bytes
SHA-256: 697497f2f66e442ea4ab9011ead6941247ccb4f65898e82dff777b0564ca4cc1