Malicious PDF — malware analysis report

Static analysis result for SHA-256 2665ac1931ae41b0…

MALICIOUS

PDF

72.2 KB Created: 2021-02-19 01:45:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1fa6c0bb8123e1b7ca2ab83b0e8bc705 SHA-1: dbf33c404710ff735509498a00edb4a4739e8dee SHA-256: 2665ac1931ae41b032aed2dc9eb3779c89d9e0f52794fcf47dd6f340af8dd288
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://druttle.ru/wix?keyword=the+house+of+sand+and+fog+book+pdf PDF link annotation
    • https://fudiditinip.weebly.com/uploads/1/3/1/4/131453724/f190ac8b7d.pdfIn PDF document text
    • https://lamipakowoj.weebly.com/uploads/1/3/2/8/132814468/jogikiji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470679/normal_5fd26b958668b.pdfIn PDF document text
    • https://kakejomoweva.weebly.com/uploads/1/3/4/6/134674311/c1571ddefd.pdfIn PDF document text
    • http://13millions.store/54808654656cov93.pdfIn PDF document text
    • https://dowoxadi.weebly.com/uploads/1/3/1/3/131380004/xikiwesunoxaj.pdfIn PDF document text
    • https://cdn.sqhk.co/moxasapiwer/uohiAhh/vijuj.pdfIn PDF document text
    • https://cdn.sqhk.co/xewazezikufi/ihigeUR/gacha_club_wallpaper_cave.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuwatipo/hijjggo/music_lab_song_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/pegebatanuz/hyDjjhd/the_oregon_trail_american_settler_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/2u1kvyv/flick_goal_poster.pdfIn PDF document text
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/duvokasekatov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gobipubefosoja.epizy.com/96685826497.pdfIn PDF document text
    • http://lubuzozerewa.rf.gd/becoming_a_better_me.pdfIn PDF document text
    • http://nazifaba.rf.gd/proxy_vote_form_wandsworth.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_off0000debc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBC 5328 bytes
SHA-256: 45bd0f50b905bc771a2a211b00e165bd6524895af6303eac1fa1e17de4f5e2c9
font_01_sfnt_off0000f0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D8 10280 bytes
SHA-256: 1e21da75c27a14320144d0b0fe7cc490757b979622d9bda2b81160b0640ab035