Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b245dee0823635…

MALICIOUS

PDF

81.3 KB Created: 2021-03-23 12:17:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: eb6890889ff230902684fc90f385b353 SHA-1: 1faa4ea71553d40ec8bf8bef905ecf9554a90e4f SHA-256: f3b245dee08236351f8d7df6db38c48165a0f77c66dc5383ac2bd2ef2ba4c61a
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. The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or scam campaign. The presence of external URIs and the ML classification strongly support a phishing attack pattern.

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://bologen.ru/award?keyword=allan+poe+poemas+pdf PDF link annotation
    • http://wogapunise.iblogger.org/42101045822.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/teatv_8._5_mod_apkf5c8a.pdfIn PDF document text
    • http://jivavesomuviz.getenjoyment.net/convert_to_editable_word_adobe_reader.pdfIn PDF document text
    • http://hotel-engels.ru/5178944778zylc2.pdfIn PDF document text
    • http://begemotiks.space/crooks_like_usquscl.pdfIn PDF document text
    • http://juvivufokif.22web.org/68844421040.pdfIn PDF document text
    • http://kalavar.xyz/laxizemobafinomerf8ddk.pdfIn PDF document text
    • http://bunokegezodidur.iblogger.org/saunders_cervical_traction_device_user_guide.pdfIn PDF document text
    • http://konolux.medianewsonline.com/37418614021.pdfIn PDF document text
    • http://vetobiz.sportsontheweb.net/68754896971.pdfIn PDF document text
    • http://bikokobolo.sportsontheweb.net/most_popular_game_companies_in_the_world.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bomapogixojepo.epizy.com/dls_19_profile_dat_hack_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a72b8996-6aa5-4b0f-ad65-6f0bf3d8ecae/dupetatone.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/8129576517.pdfIn PDF document text
    • http://fijinibegomiba.rf.gd/10800627532.pdfIn PDF document text
    • https://165abacb-5525-4e66-971c-c167d859e756.filesusr.com/ugd/f3f2a5_ba5f826b2e2c41719f929c05735d4211.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xetasif/chapter_2_kinematics_in_one_dimension_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b9828a2-2e22-42bb-8d0d-2e055bf77699/nalc_contract_vote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/874acf14-9c07-465b-a2af-6da94cdfdf5c/how_to_clean_a_disgusting_carpet.pdfIn PDF document text
    • https://05efeaee-ea5b-4dc8-bddc-a5098cc0dcbd.filesusr.com/ugd/c06c30_f3dd75633e3f42268b966996d614dd62.pdf?index=trueIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_2890aaa4b78b4adda56c0cd37b91fe37.pdf?index=trueIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_f14acc8c1f324a60856d4b087c72ef1a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/pabofifefiximemif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4cf7992-ee37-481e-ae8c-3059c7ebd57f/general_data_protection_regulation_gdpr_compliant.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/nulizekipekukigenajij.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_off0000fe9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9A 5080 bytes
SHA-256: 3d163178eb9222027dd7bfe3e733359243ce926d2db926de86ec7f2e734cfd63
font_01_sfnt_off00010fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD3 13240 bytes
SHA-256: 2e7208b1aa5010e8ed9ee7892ea166d9b0caceded1d6197c1984172540a1cace

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