Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd9786b11cbdb32…

MALICIOUS

PDF

75.6 KB Created: 2021-03-20 06:46:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 59a4b097c84e7a74fcc71855ebc0b341 SHA-1: 799cb077ba840bb158e848895b6cb1c630453bec SHA-256: fdd9786b11cbdb32b1605acf0ffd5f675c139c4b77c3764227a2b568ae29442b
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a phishing site or download further malware. No scripts were extracted, but the PDF structure and URL heuristics are sufficient to infer a malicious redirection attack.

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://zajinet.ru/strik?utm_term=mansions+of+madness+recurring+nightmares+uk PDF link annotation
    • http://nesorus.mywebcommunity.org/panasonic_viera_tv_remote_volume_not_working.pdfIn PDF document text
    • http://fakaluwu.scienceontheweb.net/80791214636.pdfIn PDF document text
    • http://pasipodo.mypressonline.com/the_astral_body_and_other_astral_phenomena.pdfIn PDF document text
    • http://gerododuxokamid.iblogger.org/88855415666.pdfIn PDF document text
    • http://f13x.xyz/74514910617h5by0.pdfIn PDF document text
    • http://xidufefonudug.sportsontheweb.net/69739844309.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/gd5wjjQ/32490669052.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/madame_bovary_book_cover.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/jbFgiAI/94539563315.pdfIn PDF document text
    • https://cdn.sqhk.co/mubutuve/gigibng/zombie_shooting_vr_arcade.pdfIn PDF document text
    • https://cdn.sqhk.co/pelotuwew/3OSsYNh/libafidonaxetubofa.pdfIn PDF document text
    • http://bottlechainworld.com/top_geotechnical_engineering_companies_in_uk21l2s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://boxaliredut.epizy.com/ielts_reading_answer_sheet_idp.pdfIn PDF document text
    • http://wenulusevikofa.myartsonline.com/web_development_contract.pdfIn PDF document text
    • http://sazebufaz.atwebpages.com/zowisevonukege.pdfIn PDF document text
    • http://kebenubes.onlinewebshop.net/ucc_admission_list_2020_19.pdfIn PDF document text
    • http://gakamaxoluzes.atwebpages.com/funza_lushaka_bursary_application_form_for_2020.pdfIn PDF document text
    • http://dopovis.myartsonline.com/31742304534.pdfIn PDF document text
    • http://mugekalamiwatek.epizy.com/34150706770.pdfIn PDF document text
    • http://kirogebi.epizy.com/lopi_wood_stove_insert_double_door.pdfIn PDF document text
    • http://vizomonuzujo.onlinewebshop.net/case_study_sample_for_psychology.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB25 5472 bytes
SHA-256: 9a5a2865b1ced198b4919a96887416b7991c1f00dabc485bdd299a4cfc9e50a6
font_01_sfnt_off0000fda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA3 10232 bytes
SHA-256: 0816d0940c49acdb52d35b3dd8c50ff43a5708a90cdda48595abbb4c83e08156

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