Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e7d83ea6562c86…

MALICIOUS

PDF

79.5 KB Created: 2021-03-16 17:37:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ad77515ac968fc27dd24e998107b51ba SHA-1: 8b73ffc8b24b3458dc5483813b7c4bfda8a10020 SHA-256: 22e7d83ea6562c863db09d692390f64db5b9a1d64b80c30d37a29e8905dc7a09
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, including one that appears to be a phishing lure related to driving test appointments. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, suggesting an attempt to obscure malicious activity. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a compromised site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/strik?utm_term=how+to+check+a+driving+test+appointment PDF link annotation
    • http://jukavoluv.iblogger.org/taviguzox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414689/normal_5feb73456d347.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_600d8ec6d7df6.pdfIn PDF document text
    • http://davebamonuzove.medianewsonline.com/xilitusuzujupe.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/suwokotuzeg.pdfIn PDF document text
    • http://xavelodezazil.iblogger.org/sukas.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/tufomun.pdfIn PDF document text
    • http://pulaketuwogeza.22web.org/wivufebefub.pdfIn PDF document text
    • http://lidagejelotodu.22web.org/55417095544.pdfIn PDF document text
    • http://sifaritube.sportsontheweb.net/vixupuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fepoxojosatomu.epizy.com/88910395864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/204633b1-1e7f-4800-b8fb-25a9ca49756e/nawavotenemojetor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9974285-17cc-4d5d-acb0-859853c164c1/books_for_husband_and_wife_to_read_together.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f55c273-40ae-46c6-a7f3-d43f1248da89/best_chess_for_beginners_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e0e0796-d6d1-49e4-9367-9d58fdf3c9c1/how_to_reset_viper_auto_start.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c14988e-1949-4b63-8be6-0517db0b38bc/bissell_pet_carpet_cleaner_not_spraying.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d53bf9c3-69f1-4a18-8c45-699e8a73aa45/dell_optiplex_790_power_supply_diagnostic_button.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c43b688a-8bb7-41aa-b9fb-588afb681456/willmingtons_guide_to_the_bible_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c12b6d2a-2b6e-400d-b691-70c1c96f6387/lodubaxolofunewodedadod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27f2ef8d-e91c-490e-b63c-da99d33fe3d8/the_endless_summer_2_dvd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53152ce0-3fe8-45cc-8db4-334ed15e0ac7/dometic_rv_awning_replacement_fabric_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b034f9d-50f1-4829-8e79-0b404346051d/catia_v6_tutorial_beginner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e35e19-539f-4b51-b04f-e146c0478483/kukomexidetokibajiwelef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9400c66-ae29-43b5-a6f5-81dd5f3b0a72/15023989062.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_off0000fb6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6F 5632 bytes
SHA-256: b4a76c57702f7a0335b20d15f5d8a50c8db2d84b435ee001049477f06d63961c
font_01_sfnt_off00010e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E85 9916 bytes
SHA-256: 3254251c8c28da1f84eb2325854f726ee2ba69658c053f7b8355b565b0317bf4