Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a5464c4555a22f0…

MALICIOUS

PDF

75.4 KB Created: 2021-04-22 10:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5b4fcd7b5bb5dc05164760515fd74b27 SHA-1: 465654e0df382ecbcdabcb9d7c91c03f09748d59 SHA-256: 9a5464c4555a22f02894abbfb371439fd69984ddfdc191bbe048221c8e5364a9
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the PDF is part of a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=bush+%2526+gerts+chicago+piano+value PDF link annotation
    • https://gexawagezawa.weebly.com/uploads/1/3/2/6/132682787/2681636.pdfIn PDF document text
    • http://sovuradema.medianewsonline.com/nitrogen_generation_plant.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/jiziguzigap.pdfIn PDF document text
    • http://linza.media/together_with_english_language_and_literature_class_9ncxl7.pdfIn PDF document text
    • http://widaluvawigomum.scienceontheweb.net/bartleby_melville.pdfIn PDF document text
    • http://tabikola.online/48982279138mv7au.pdfIn PDF document text
    • http://termometr-medikal.site/naruto_shippuden_games_psp_freehlbjw.pdfIn PDF document text
    • http://midarujiwuvi.mygamesonline.org/foneletagimesanudoke.pdfIn PDF document text
    • https://bivojivowuru.weebly.com/uploads/1/3/4/7/134726538/0f8b0572d0e500.pdfIn PDF document text
    • https://juxokiwi.weebly.com/uploads/1/3/4/5/134594748/bazewerebujurugefij.pdfIn PDF document text
    • http://reabook.online/quantas_questoes_de_filosofia_no_enem6naxj.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/jumper_cables_amazon_india.pdfIn PDF document text
    • http://wewofif.scienceontheweb.net/30993334980.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0578b854-67e3-4a5a-9217-eb14c2483b66/whirlpool_front_load_washer_error_code_f01_e01.pdfIn PDF document text
    • http://kugukokoner.myartsonline.com/28467097320.pdfIn PDF document text
    • http://retiziwo.myartsonline.com/83164347824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/535d1eed-edeb-4163-9964-b71b097f9552/divine_mercy_chaplet_video_ewtn.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/bobby_bones_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1604f340-0e84-4609-9eb2-bb0ff1cc6d03/febo_flame_electric_fireplace_zhs-23-a_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d849c88-ec4e-4eec-b3d9-96bba153fd2a/healthpartners_unitypoint_login.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76287497-8062-483b-985f-87eb9d98ca8e/fidonironiluzifuvabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1aa0e26-1f2e-429b-9122-7ee2000f3899/anime_du_genre_no_game_no_life.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_off0000edba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBA 4476 bytes
SHA-256: 3339710ed3f967084ba2680b0a98ac99ec3fc371eafb31cff4a90f89fdfb8439
font_01_sfnt_off0000fced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCED 10480 bytes
SHA-256: 53fecef2ae55df3db34853bd59355d7750517cccaf5094fd22d688592f94c0cb

Open this report in the interactive analyzer, or submit your own file for analysis.