Malicious PDF — malware analysis report

Static analysis result for SHA-256 f44f9bee5e0cb110…

MALICIOUS

PDF

80.1 KB Created: 2021-03-06 13:52:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: abcb8d4e47f250d7bb821200982dbb9d SHA-1: a6de4c2c62435c5219c455ab08eba83f8b3cfdcd SHA-256: f44f9bee5e0cb11044f643482559cad5539686ce37d90512c006d9f528fd2078
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm designed to redirect users. The presence of external URIs and the nature of the heuristics suggest the document's primary purpose is to drive traffic to potentially harmful 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
  • 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://kuzutuzo.ru/strik?utm_term=star+wars+heir+to+the+empire+volume+1 PDF link annotation
    • https://cdn.sqhk.co/jakufomego/WKwgzci/92471945196.pdfIn PDF document text
    • https://cdn.sqhk.co/bikulatitaxe/hejfjca/pumukatuzinejafixibejoj.pdfIn PDF document text
    • https://cdn.sqhk.co/vadavenaw/2Saggoy/68425166025.pdfIn PDF document text
    • https://cdn.sqhk.co/tikalijit/OlWgjif/voice_changer_celebrity_voice_box_mod_apk.pdfIn PDF document text
    • http://pafewubeb.iblogger.org/24203039361.pdfIn PDF document text
    • http://womans30planet.com/what_are_the_different_elements_of_technical_analysisg1nsc.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/38ja5ha/tower_defense_simulator_twitter_codes.pdfIn PDF document text
    • http://govnosiakxws.online/recharge_pcs_payment_paypalt53zo.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/DPljhrx/12180813137.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/ice_cream_truck_delivery_service3onjw.pdfIn PDF document text
    • http://rezltml.xyz/331607435982kto9.pdfIn PDF document text
    • https://cdn.sqhk.co/wolonevavaru/pfxgfLZ/nba_2k20_ps4_pro_review.pdfIn PDF document text
    • https://cdn.sqhk.co/desixurate/ejtqaMO/talking_parrot_breeds.pdfIn PDF document text
    • http://repair-monokoles.ru/52405908621bqge1.pdfIn PDF document text
    • https://cdn.sqhk.co/xizaxulubezu/eUR8Rt8/xajamepeletebubatexupuxul.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://uploads.strikinglycdn.com/files/024a677a-6bab-45d5-be4a-3cd365303f78/fodunijadetoru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7947ed1f-aa52-4745-ad89-55dda9a9b642/tebutikafametafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfbe285f-3620-4b9a-9dbf-50084e1ad5ed/nopibipifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ed1efa7-8791-4630-a916-20f62e3e9c7d/wazikavudar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/219bf2fd-e3a0-4bac-a245-98657d7c7a36/dokidaxidawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fa934ff-d568-4df8-ae95-5df1d171fdd0/lightning_thief_summary_chapter_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c340ce22-67fe-40ad-8042-e99b4de129d8/c_programming_tutorial_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46eab287-fc61-4514-8159-0776dd8679af/what_would_cause_a_samsung_dryer_not_to_heat.pdfIn PDF document text
    • http://mezotake.epizy.com/columba_livia_forma_domestica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af758403-2c7c-4f3e-a3af-9385c61f8bfb/percy_jackson_books_heroes_of_olympus.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_off0000ee7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7C 5144 bytes
SHA-256: ba91874a8c1bed431f861a7bfc5f740b8851d66d8be2772f760b8368765fdc05
font_01_sfnt_off00010013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10013 10568 bytes
SHA-256: 9731d80cf597cc959b866e9a9713d97038760625d2a9124880acdc7d01b4d211
font_02_sfnt_off0001246c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378