Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b904946ea6a08d…

MALICIOUS

PDF

76.4 KB Created: 2021-05-03 21:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cb805687e0e557d95505c33526281e0b SHA-1: c574ed9fdced2307d878368e3314a70a981352b9 SHA-256: 92b904946ea6a08d2bffddf8ee737770fea0e8ff408b560e4dafaa6c8c3a29a9
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable domains and are likely used to redirect users to malicious sites. The presence of 'utm_term' parameters suggests a campaign attempting to mimic search engine results to entice clicks.

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://bologen.ru/strik?utm_term=xbox+one+controller+charger+cable+asda PDF link annotation
    • http://pc-remont.website/64277622593lzlh4.pdfIn PDF document text
    • http://penageli.getenjoyment.net/11058583575.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://rimarilomikozu.medianewsonline.com/que_son_los_alcanos_alquenos_y_alquinos.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/ieqieEg/lazuvilo.pdfIn PDF document text
    • http://paypallsecurity.com/49774618066jr0ki.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/marketing_concepts.pdfIn PDF document text
    • http://pivolirarorip.mypressonline.com/bank_po_complete_syllabus.pdfIn PDF document text
    • http://fruitik.space/zeboritosaxgon.pdfIn PDF document text
    • http://walkover.me/521642845849xvpn.pdfIn PDF document text
    • https://cdn.sqhk.co/rapigufagi/dggegd2/sniper_movie_1993_cast.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/21d23b88-ccb2-4f99-829d-cc345d9785ee/pll_algorithms_cubeskills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb7ee46-0a92-4507-8d24-c489aa4fed99/mabilaxunemikamopiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d14cf7e8-867d-4a4a-a4c3-750c5126af89/descriptive_writing_examples_grade_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41d8994a-7055-4b3c-bb37-f4f70c29ad41/interview_questions_and_answers_for_rn_case_manager_position.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/mnemonic_dictionary_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5634a255-d227-4681-89ac-3237d5cfd75c/89246577502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/583713b5-62c6-42da-a2f9-43fa827e1b1a/14165426749.pdfIn PDF document text
    • http://jaxunukologefis.onlinewebshop.net/camstudio_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a73ef09-dd45-431b-a603-595f1ed0e15f/jam_speaker_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d2e1f51-ff3d-40fc-969f-57806670afe0/saxon_math_4th_grade_book.pdfIn PDF document text
    • http://nimanexobubibub.onlinewebshop.net/functional_analysis_cbt.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_off0000eea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA1 5388 bytes
SHA-256: 7f9ef172d32ff954bfdb5400ff3d1a62f01cd287ed064419dbec4ce485bc6214
font_01_sfnt_off000100e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E5 10364 bytes
SHA-256: d00be0be6a6ea5c780e1dfdb31acd5fd948ec0b8ac16b7a179974e3bb5cff6c8

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