Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8978f4c52656b9a…

MALICIOUS

PDF

74.7 KB Created: 2021-02-24 14:08:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 254cc381673504e24b80e729c0eb9448 SHA-1: 9653956318028dbf46653100421d557485633e4e SHA-256: b8978f4c52656b9a99f354e494bf505b90e6df54b465d040411ddf7b4c5427a4
136 Risk Score

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
  • 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://bologen.ru/strik?utm_term=free+printable+christmas+family+feud+questions PDF link annotation
    • https://cdn.sqhk.co/zowolanazew/jhc0egc/august_2020_calendar_cute_design.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/snwhhgd/zuxazepotewopagafetowuj.pdfIn PDF document text
    • https://cdn.sqhk.co/dowusutitozi/mihigec/setofexoputa.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/9QaP2Mz/greatest_hits_radio_freesat.pdfIn PDF document text
    • https://cdn.sqhk.co/lamiwifa/iajfBvo/90121910214.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/eheBgcD/41671760404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385862/normal_6022ebbfb7711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410217/normal_6011dd942f380.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/VgcicYq/fakudaxexilepi.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/ha5hagg/basedofetubukubumoma.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/g3giKof/best_piano_keyboard_app_for_android_tablet.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/lezopobigeza/satod.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/dj_animals_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/41375366184.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/o_alienista_resumo.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_off0000e745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE745 5716 bytes
SHA-256: 3b846ac37083c3831af4281d4642996c01e4e5d9c8316176a9396668356c49e3
font_01_sfnt_off0000fa8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8D 10296 bytes
SHA-256: ebd25ca4f2650b9a9622028fdd8190daa53a17d74e34a7d4bec2ee8273078fd8