Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9141c42994d1b2…

MALICIOUS

PDF

95.5 KB Created: 2021-03-20 13:00:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8aa64a4eec11eb5f8ad1a568c258afa4 SHA-1: e75fc1327ac6b9c4dfb2ef2314680211c26825a6 SHA-256: ff9141c42994d1b20d0d89725d75bd506fc2c0f1c6f4a69abdd014cd51754260
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and flagged as part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with a malicious PDF designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 http://lozhobelir.space/who_is_responsible_for_the_initial_spread_of_islam_to_west_africa602hq.pdf In PDF document text
    • https://cdn.sqhk.co/minofavazu/iegiNhi/34514819573.pdfIn PDF document text
    • http://xozonline.ru/48847213173o07zh.pdfIn PDF document text
    • http://zutilituvinif.22web.org/39083831058.pdfIn PDF document text
    • http://wirelessinfo.ru/game_of_thrones_season_7_hindi_dubbed_free_download_filmyzillaz734y.pdfIn PDF document text
    • http://ompala.store/40976761044xqz4i.pdfIn PDF document text
    • http://moneyindia.site/92271278077dt17x.pdfIn PDF document text
    • https://cdn.sqhk.co/segenapiza/5oE9wFu/zuwelopazukitinara.pdfIn PDF document text
    • http://nuwevabufa.mypressonline.com/63884616734.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/mowinobewojatowu.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/Yibhhm8/commander_in_chief_definition_kid_version.pdfIn PDF document text
    • http://deutschebank-meine.com/jasper_report_expression_editor_boldb9int.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/ihajhev/595038336.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/2hhGJic/82433171302.pdfIn PDF document text
    • http://businessoutsourcing.org/download_spine_2d_full_crackks3kb.pdfIn PDF document text
    • http://mekujoviwe.mypressonline.com/98_honda_accord_owners_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/Xr6F2PkPTcg/wb?keyword=call%20of%20cthulhu%207th%20edition%20playerPDF link annotation
    • http://zewipurorafe.epizy.com/8160109199.pdfIn PDF document text
    • http://bebovufuvuji.myartsonline.com/ms_access_2007_tutorial_download_free.pdfIn PDF document text
    • http://tiwosutodegadax.onlinewebshop.net/que_hace_un_lider_daniel_goleman.pdfIn PDF document text
    • http://dovovefuwaxav.epizy.com/47693299022.pdfIn PDF document text
    • http://valedezupejof.epizy.com/hasselblad_500cm_for_sale_san_francisco.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_off0001335b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1335B 5568 bytes
SHA-256: d832456d5a62d83f7892e3532b771133e210486782fa6bb6d4ffa9ad9b2f3f30
font_01_sfnt_off00014654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14654 11976 bytes
SHA-256: d9d1e48a5073984b86cf4b299d00c6bcd48fbddbc8454e387899cdb819e9b527

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