Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e7bdcabdb4a623…

MALICIOUS

PDF

83.3 KB Created: 2021-03-19 12:43:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ce886cb379d89a413b92fc28084da3b SHA-1: 554a7348da99b57747400bf6190010db44673321 SHA-256: 09e7bdcabdb4a62301c93df924fca914219b9986bcdd39f58e04eaa71b236a48
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of these links, 'https://pelibifir.ru/wix?keyword=dewalt+dw660+bits', is flagged as suspicious. The presence of numerous links suggests an attempt to direct users to potentially malicious or SEO-manipulated content, consistent with phishing or spamming activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/wix?keyword=dewalt+dw660+bits
    • http://organic-ita.space/48070366506oxvlq.pdf
    • https://cdn.sqhk.co/wujozuzewed/hjGIZgc/stick_run_hack_apk.pdf
    • http://storeyou.store/which_water_dispenser_is_bestyl71h.pdf
    • https://cdn.sqhk.co/bexutavukaro/ebjg6hj/1207292042.pdf
    • https://cdn.sqhk.co/mipowepiwof/hgLjdhd/calisthenics_workout_guide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_7de28936690d4878968142508fafa99d.pdf?index=true
    • https://s3.amazonaws.com/defipedibe/cheran_pandiyan_tamil_song_masstamilan.pdf
    • https://5366dd3f-28a3-4342-b8e5-5bed86455aec.filesusr.com/ugd/a92322_dba5aec141bc476794da59a7a1bf983e.pdf?index=true
    • https://49b821e7-ee7e-41b4-809b-d0417b8c1ddf.filesusr.com/ugd/927743_bef910cd1ac343b996330695cea80452.pdf?index=true
    • https://s3.amazonaws.com/gofiguj/memigotelebasipugubez.pdf
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_1f2daaffe4db4d7e94bfc90c4237ad44.pdf?index=true
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_ee5d544090c0417fa7fdfac50df97bdb.pdf?index=true
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_60688902d9084cf1925b91e1f0d89fa7.pdf?index=true
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_096296a8264d40e28235a549260468c1.pdf?index=true
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_24ac8fdbe7044a9e8c63124a981fcaf6.pdf?index=true
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_a31af4e0896f461dae4fa5cfe6491819.pdf?index=true
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_53ea115baea7494e849de3003c5894fe.pdf?index=true
    • https://878ee1be-828d-48b9-a24a-84283cf66a1c.filesusr.com/ugd/86936c_5d5a7db95f814ec9bc008500e6c6483d.pdf?index=true
    • https://s3.amazonaws.com/fobupojowojon/xedifovulaxarelel.pdf
    • https://s3.amazonaws.com/suxugipipolazog/4100634064.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f910.bin
8ec75fb818fa4c29b769da9e04646808486aaafdd16a34d39607e4ed6dde3389		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF910 4824 bytes
font_01_sfnt_off00010985.bin
955713bb7e748ed3d4bb8897a089975087a0610fa87e0756f165e46743d0fe90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10985 11596 bytes
font_02_sfnt_off000130b7.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130B7 4324 bytes

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