Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b2d7ec684f545fd…

MALICIOUS

PDF

82.2 KB Created: 2021-02-27 00:54:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b5e900f71c34efc0bb8e4e2b51f68ddd SHA-1: 6748cd1a18da42378c8eb4c7d48fc8aae6ac0a84 SHA-256: 3b2d7ec684f545fd2d00dab3ea951479ba3ca46510ce26239a15224eff7d23ac
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, with several pointing to known malicious redirectors and link farms hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or scamming. No scripts were extracted, but the primary attack pattern involves redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/aws?utm_term=yamaha+moto+4+250+price In PDF document text
    • https://cdn.sqhk.co/riketumes/UOCjgih/70377447507.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/numimedujoxovad.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/17214515472.pdfIn PDF document text
    • https://cdn.sqhk.co/ramawuvade/icVq2hf/cloudy_diffuser_discount_code.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405197/normal_6007a99b351f7.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/iYfvjgJ/58759002366.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/Gifchax/herpes_simplex_virus_encephalitis_radiology.pdfIn PDF document text
    • http://kidepokapila.22web.org/latitude_e6410_wifi_driver_32_bit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450511/normal_60154726c5a43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384155/normal_602b40e25d1ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pubopelej/gta_vice_city_game_cheat_keyboard.pdfIn PDF document text
    • http://xupudajiwozov.epizy.com/scrabble_cheat_sheet_2016.pdfIn PDF document text
    • http://litaxuroba.rf.gd/kilikevexat.pdfIn PDF document text
    • http://nixuverojezuluz.epizy.com/12025901487.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/8828558551.pdfIn PDF document text
    • http://wefexafunedex.epizy.com/assassin_s_creed_unity_apk_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/sewusakugevag.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/how_to_change_the_drive_belt_on_my_husqvarna_riding_mower.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/59670239993.pdfIn PDF document text
    • http://vunanan.epizy.com/devoledupafuseg.pdfIn PDF document text
    • http://zexukojol.rf.gd/activity_connection_wacky_wordies_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/massachusetts_involuntary_manslaughter_sentencing_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/audio_to_video_converter_app_free.pdfIn PDF document text
    • http://fatesixinubumot.epizy.com/11255418911.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A0 5092 bytes
SHA-256: 94b375e677ba6c4eca3c154780baa29d855857eddaaf7709c32d44c25a54ea35
font_01_sfnt_off000106f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F4 11096 bytes
SHA-256: e3c0cddd0e6d9245a97a73db72386a535339253bee3b2c0ccf6fe7d8f06393c9
font_02_sfnt_off00012ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361