Malicious PDF — malware analysis report

Static analysis result for SHA-256 113ad4b3f93e6edc…

MALICIOUS

PDF

67.2 KB Created: 2021-02-14 08:17:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4dddaa492ec83a9617c1657f85235cb2 SHA-1: 170ae1e53491b4cb2473de4ec3068feade8e1080 SHA-256: 113ad4b3f93e6edcf562613c6a2fd8a66f142f6f4f1dcd1d1a8bece1c91e42df
186 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.
  • 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://leonvi.ru/wb?keyword=marriage%20d PDF link annotation
    • https://cdn.sqhk.co/fipufose/Nhjgj1c/wish_you_all_the_best_quotes_for_exams.pdfIn PDF document text
    • https://cdn.sqhk.co/joduragenep/KEdjcol/paul_hardcastle_songs_youtube.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457838/normal_5fec87015e4c6.pdfIn PDF document text
    • https://cdn.sqhk.co/vuluzazogur/pGhGgdI/dr._driving_online_game_play.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454971/normal_600f55fd5b82f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445736/normal_5ffc9210e9c7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464850/normal_5ff884c129687.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/ia1jcEF/dragon_lords_yugioh.pdfIn PDF document text
    • https://basixafonamolod.weebly.com/uploads/1/3/1/0/131069750/cdaddc6a37f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414678/normal_5fee0fb81358a.pdfIn PDF document text
    • https://paxituzupinemof.weebly.com/uploads/1/3/5/3/135303349/turerojanadop_gogumozewidum.pdfIn PDF document text
    • http://copyright-helps-team.com/965318034718csrz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://livodubudo.rf.gd/17158009437.pdfIn PDF document text
    • http://rezopokus.epizy.com/18464071367.pdfIn PDF document text
    • http://gunexukod.epizy.com/falcons_injury_report.pdfIn PDF document text
    • https://musescore.com/static/musescore/scoredata,jsoIn 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_off0000c63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63D 5464 bytes
SHA-256: 504cbc8ada9f937ea5d2d14ff4305702eba2fe3f286e1890df07d54a208c647c
font_01_sfnt_off0000d8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BB 11628 bytes
SHA-256: e1cb17fb2cf01255d6c1baf5491c25b9a754ff612136332754ec39e041e11daa