Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf4fae961cc636c…

MALICIOUS

PDF

86.9 KB Created: 2021-05-05 20:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3c382b2cfd2bf27defefd5a72ef365e4 SHA-1: 152967d3ae8b9a3d053aaa95f0792575bd21e55d SHA-256: adf4fae961cc636c7beb3cad74fe237b2b2766657ffaae9b2be653d813a6b9d8
126 Risk Score

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 0.9996

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://lozipotod.ru/strik?utm_term=how+do+you+say+yes+in+french PDF link annotation
    • https://tesetugunujogub.weebly.com/uploads/1/3/4/0/134040467/de37d643a2ed1.pdfIn PDF document text
    • http://jovefupe.mywebcommunity.org/63053007497.pdfIn PDF document text
    • http://narovomesizi.medianewsonline.com/sidozisirufona.pdfIn PDF document text
    • http://momentshop.space/music_box_song_freeq91vt.pdfIn PDF document text
    • https://medabuxizuf.weebly.com/uploads/1/3/4/3/134383904/zutatobumixig_sodokawejefoba.pdfIn PDF document text
    • http://eu-study.ru/basic_communication_skills_ppt_free9gmit.pdfIn PDF document text
    • https://zanazajerepa.weebly.com/uploads/1/3/4/0/134012527/wixujegerujojibav.pdfIn PDF document text
    • http://vodizurulenega.mypressonline.com/a_level_computer_science_ocr_textbook.pdfIn PDF document text
    • http://vitrinachel.ru/vugadepisezigatudefufowuk0ygsk.pdfIn PDF document text
    • http://indir-kazan.com/dyson_animal_vacuum_cordlessp5xzb.pdfIn PDF document text
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/5279687.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/telasebisu/curso_programacion_neurolinguistica.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/old_bhojpuri_movie_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/vinapi.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/towuga.pdfIn PDF document text
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_ba8e1f4f231c4681b8e95bafd6ec4cbc.pdf?index=trueIn PDF document text
    • http://supuwevul.atwebpages.com/xizasipikonivoronanidak.pdfIn PDF document text
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_34c600adef59498597d3c46228fa3726.pdf?index=trueIn PDF document text
    • https://efe523a3-d756-4f55-ba91-412f3a718e00.filesusr.com/ugd/236571_d2aaf5424cdb417891aa1c8d5363ddde.pdf?index=trueIn PDF document text
    • http://bebovufuvuji.myartsonline.com/vefadu.pdfIn PDF document text
    • http://vujijemu.atwebpages.com/77660919585.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_off000114e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E2 5232 bytes
SHA-256: 8d680a8e6ce74ea223851dcbd762eb2de84e9f899f88e8baca0ba30dcba172d4
font_01_sfnt_off000126c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C4 12192 bytes
SHA-256: 4eca9225e5b45db122cdca73108d1e8d44000ead69111d6561e9a1d9755007a7

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