Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2291c0afe08af29…

MALICIOUS

PDF

75.9 KB Created: 2021-06-06 08:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3eb6dc09abc9b4097f1cc71e9442dcb1 SHA-1: aa98b59ac2c5ffc92a5da3f5354880fc41e95358 SHA-256: b2291c0afe08af2910ac982a6860189da3357d8d003a67854e59d0a7f5ab38e7
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to 'baarspo.ru' and using a 'utm_term' parameter suggesting a phishing lure related to Beresheet spacecraft news. Heuristics indicate this PDF is part of a link farm on disposable hosting, and ClamAV detection confirms it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=beresheet+spacecraft+news PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444104/normal_6069300ca5fda.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4403948/normal_60b45eea85d92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421781/normal_6011ca4cd906a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454546/normal_60bc02eddff7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_600a9a8a41f6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bemulopawed.pbworks.com/f/spiderman_in_hindi.pdfIn PDF document text
    • http://pukagij.pbworks.com/w/file/fetch/144468120/free_imvu_credits_no_human_verification_2020.pdfIn PDF document text
    • http://fijinatuzut.pbworks.com/f/tujibunanosurulexaludaja.pdfIn PDF document text
    • http://xosufixemuf.pbworks.com/f/15803783143.pdfIn PDF document text
    • http://paderukut.pbworks.com/f/how_to_adjust_accelerator_pedal_position_sensor.pdfIn PDF document text
    • http://sepaxebi.pbworks.com/f/strike_force_heroes_kitty_3_hacked_online_games.pdfIn PDF document text
    • http://patimedudemu.pbworks.com/w/file/fetch/144676449/mubit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba6ef060-d257-4975-ab38-0c93c62d7368/ulysses_poem_explanation_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb3becd3-19a5-460a-b9fc-9c9b5f905127/38433066358.pdfIn PDF document text
    • http://feteselulo.pbworks.com/w/file/fetch/144632925/the_twilight_saga_eclipse_full_movie_in_hindi_dubbed_480p_download.pdfIn PDF document text
    • http://tazijebep.pbworks.com/f/91587205795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e05e8ac2-329e-4322-93fa-ec0086fde075/visual_c_2012_how_to_program_5th_edition_solutions_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/786b86dc-3514-4563-8570-965b2c670ce7/how_to_exploit_in_prison_life_2021.pdfIn PDF document text
    • http://lebamojopa.pbworks.com/f/covid_door_screener_job_description.pdfIn PDF document text
    • http://farejutotej.pbworks.com/f/the_100_temporada_6_personajes.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_off0000e9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A2 5212 bytes
SHA-256: 444ce838c0c11bbb5ef13e46c922e0f54470afdf6f09f3f73fb65f3c55ea9136
font_01_sfnt_off0000fb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6C 11604 bytes
SHA-256: a5dcdcf8fc7b3d20c1259e7a8ce782cc298d69f927badf961a2e040e24174153

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