Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ab3ee1608bd335…

MALICIOUS

PDF

88.8 KB Created: 2021-06-02 23:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc0013a25d5552e36fd0df2bf2d3ee39 SHA-1: d1c51e0c44825ccf7682334926d205952e78596b SHA-256: 24ab3ee1608bd335bdb443aee4bc21133b771193b64008c11154842349b121fb
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used to redirect users to malicious websites for phishing or to download further payloads. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristics suggest it's designed to facilitate the download of other malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://queure.ru/pbw?utm_term=how+to+day+trade+for+a+living+andrew+aziz+pdf+free
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/jupipig.pdf
    • https://selikiwomutarew.weebly.com/uploads/1/3/5/3/135329437/5859607.pdf
    • https://jasugigikimodo.weebly.com/uploads/1/3/1/3/131383258/e98c165.pdf
    • https://kuvuwivozud.weebly.com/uploads/1/3/6/0/136091804/2437508.pdf
    • https://jetovalanowu.weebly.com/uploads/1/3/0/7/130739462/989072.pdf
    • https://madoxeviwijiri.weebly.com/uploads/1/3/4/4/134475969/lanevikub-wiluleguj.pdf
    • https://lusugola.weebly.com/uploads/1/3/4/5/134599647/7b934f54a6d52.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bupataved.pbworks.com/w/file/fetch/144427668/what_happens_if_you_bump_your_nose_after_rhinoplasty.pdf
    • https://uploads.strikinglycdn.com/files/4d55ac20-3458-42a9-b5c8-9cd441472120/4891960609.pdf
    • https://uploads.strikinglycdn.com/files/26e18513-cbff-472a-a995-76568c5b8374/get_taller_program.pdf
    • https://uploads.strikinglycdn.com/files/a577b68d-39f5-49cd-b21b-162c44fb4a40/44920123255.pdf
    • https://uploads.strikinglycdn.com/files/d1c1b46c-c3b6-40f8-ad7d-94647d38f141/vosen.pdf
    • https://uploads.strikinglycdn.com/files/c151be33-259b-4a2a-b1f1-5b015644d392/gidufokofafasiteletiwobe.pdf
    • https://uploads.strikinglycdn.com/files/d0ee2ce6-af1f-42ac-879c-919f5d36f3e5/6331941675.pdf
    • https://uploads.strikinglycdn.com/files/a59c8271-aeca-4b5e-9e51-ab8787c79537/why_wont_my_honda_generator_start.pdf
    • http://genarozep.pbworks.com/w/file/fetch/144522444/network_marketing_presentation_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/50d18749-9073-4670-8e59-337665036c17/84257376647.pdf
    • https://uploads.strikinglycdn.com/files/a63b53fa-9e58-41a1-bcbe-c8baf55d2fc3/zalevipafadefolejuvaridi.pdf
    • https://uploads.strikinglycdn.com/files/767d3f05-8be6-40bd-9876-ed835e397f31/good_remove_synonyms.pdf
    • https://uploads.strikinglycdn.com/files/dba596df-1f6c-46c6-8401-2325b9097e13/monster_vision_360_camera.pdf
    • https://uploads.strikinglycdn.com/files/142129da-0acb-46cd-b3b8-9781b2d360ed/craftsman_lawn_mower_model_917_carburetor_rebuild_kit.pdf
    • http://vananizi.pbworks.com/w/file/fetch/144522066/gotagonowutuvikelivex.pdf
    • https://uploads.strikinglycdn.com/files/2b32bfd9-9f31-4f34-8031-01d38c50af03/34320789131.pdf
    • http://tusoxefum.pbworks.com/f/twilight_saga_full_movie_hindi_dubbed_480p_download.pdf
    • http://niwomif.pbworks.com/w/file/fetch/144427812/butonapujanixizunidogo.pdf
    • https://uploads.strikinglycdn.com/files/6c0dbd76-da94-43f4-8b4a-76ff65dc4135/lowest_calorie_bagel_at_dunkin_donuts.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e79.bin
43280e84f66b005327755ef8ee22267315b1273a1182acc5aff96871d6a7ab6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E79 5296 bytes
font_01_sfnt_off000130b6.bin
31bf0af83d7d1c921249a698cacd0da74afe8e1fa3079bb9fe0d8d68c20c9581		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130B6 10860 bytes

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