Malicious PDF — malware analysis report

Static analysis result for SHA-256 a67a6483cae46943…

MALICIOUS

PDF

77.6 KB Created: 2021-03-21 23:56:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 68fa77211c17c7cb5a203c8bdfbf2e96 SHA-1: 203e5ad9320b2aaad9f1a9f0515ff60a6cf2211e SHA-256: a67a6483cae4694314fc15fa7042f1b3d9c04cfd6cb7986f5a53b606247fb5ab
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which are hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'World of Warcraft BFA cooking guide', likely a lure to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://jumiwimov.ru/123?utm_term=world+of+warcraft+bfa+cooking+guide PDF link annotation
    • http://wotamojami.22web.org/musiwolubag.pdfIn PDF document text
    • http://zolorudi.22web.org/wokebivonanumubo.pdfIn PDF document text
    • https://cdn.sqhk.co/rotefuver/c6ihIjc/final_fantasy_7_remake_review.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/ficFjfq/the_walking_dead_road_to_survival_mod_menu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496391/normal_60323e537ba2b.pdfIn PDF document text
    • http://penafur.scienceontheweb.net/gulifilujonanugokujagu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453889/normal_5ff55fdf04268.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454420/normal_5fce7b01e5f7e.pdfIn PDF document text
    • https://cdn.sqhk.co/fezivabuja/aKjeYif/movie_theater_time_management_game.pdfIn PDF document text
    • https://cdn.sqhk.co/jegisizozul/djdggDE/prison_planet_ios.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://filosoko.onlinewebshop.net/internet_addiction_presentation.pdfIn PDF document text
    • http://putetudufotu.rf.gd/34306653002.pdfIn PDF document text
    • http://jatugeset.atwebpages.com/lg_g2_mini_rom.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/economia_siglo_xix_espaa.pdfIn PDF document text
    • http://xokesuluz.epizy.com/beyblade_battles_online_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/skyrim_special_edition_ultimate_mod_list.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/dirt_devil_power_express_lite_parts.pdfIn PDF document text
    • http://pozijawikubinun.myartsonline.com/what_is_a_good_lexile_range_for_a_9th_grader.pdfIn PDF document text
    • http://kuwijiti.myartsonline.com/thinking_like_a_lawyer_an_introduction_to_legal_reasoning.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/chokher_bali.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/what_is_the_future_of_life_on_earth.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_off0000f2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B9 5320 bytes
SHA-256: b5485590345e2745acfeed63bbddbbda12e5ab43c8918f32cd8422632fdfe8a2
font_01_sfnt_off000104fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FE 10504 bytes
SHA-256: 3157415eeb568e354a61373476763927a9a0e4ad8c6fe5db221aac5457f49cf1

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