Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e89f08eacb0f911…

MALICIOUS

PDF

73.8 KB Created: 2021-06-01 22:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d2b72cc951eb70248401b23e409bc0c7 SHA-1: 6902559e74926a0b30cb0aeb2059c10c253bd247 SHA-256: 8e89f08eacb0f911820f4b50137e4f9cfbc92fa8e55f21a93ec511392dc73e6d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://midufefew.ru/123?utm_term=vehicle+blackbox+dvr+manual+espa%25C3%25B1ol PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451025/normal_5fca063461efb.pdfIn PDF document text
    • https://sukevimekixav.weebly.com/uploads/1/3/4/5/134599702/fezurudufovatewiwaga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418180/normal_6027d9df1ebe8.pdfIn PDF document text
    • https://fudatavog.weebly.com/uploads/1/3/4/8/134894714/64ca76d1d1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480589/normal_606e550613087.pdfIn PDF document text
    • https://jakidanumamew.weebly.com/uploads/1/3/4/8/134881834/medudole-refef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417830/normal_6055f8af9d86a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_606ac2724d046.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485711/normal_5fcd2dc4bc468.pdfIn PDF document text
    • https://pitudonela.weebly.com/uploads/1/3/5/3/135323021/9214295.pdfIn PDF document text
    • https://guvikaki.weebly.com/uploads/1/3/4/5/134519546/sexolapepipak.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/627a7d65-1096-41f5-b94e-7853fa668b5b/forge_of_empires_pc_hack_no_survey.pdfIn PDF document text
    • http://gifavipa.pbworks.com/w/file/fetch/144417525/free_movies_plus_app_for_pc.pdfIn PDF document text
    • http://barumena.pbworks.com/w/file/fetch/144439644/tabijekasavenitosuza.pdfIn PDF document text
    • http://fisukafetif.pbworks.com/w/file/fetch/144425640/seiko_sportura_instruction_manual.pdfIn PDF document text
    • http://sajateves.pbworks.com/f/competency_based_interview_answers_communication_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a58dd958-7bf1-423c-8596-5a2e9309e361/bose_qc_35_ii_windows_driver.pdfIn PDF document text
    • http://funinupun.pbworks.com/w/file/fetch/144426966/how_to_get_into_epic.pdfIn PDF document text
    • http://zepupifob.pbworks.com/w/file/fetch/144426378/3-1_the_human_skeleton_worksheet_answers.pdfIn PDF document text
    • http://pokuwatosat.pbworks.com/f/28297518654.pdfIn PDF document text
    • http://mumasenekera.pbworks.com/w/file/fetch/144423558/25247315231.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_off0000dca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA0 5824 bytes
SHA-256: 07e9cff8341edf5f33bb4a6c28e0a84219c21c9f7ecebc220d8d7dc7cdd5fd27
font_01_sfnt_off0000f002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF002 12208 bytes
SHA-256: a68cdebe3d60348fb0a0da72598eeb4fa04628966f56dac94635a1cbcb5d8719

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