Malicious PDF — malware analysis report

Static analysis result for SHA-256 10869af204fbc140…

MALICIOUS

PDF

80.2 KB Created: 2021-09-05 08:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 179780d0d3d0351985cc42396ba2db6c SHA-1: 7b1d11a5e489bc04084e6275122d172e2d6a456b SHA-256: 10869af204fbc1409da190969d9d7c6c17d5cebe2025ff50369d228de59ee9ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to other PDF files hosted on various domains. This suggests an attempt to manipulate search engine rankings or distribute further malicious content, aligning with phishing and potential exploitation tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://medvor.ru/uplcv?utm_term=insert+pdf+in+word+low+quality PDF link annotation
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/fesid.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210815_DFED0FFF51FB25D6.pdfIn PDF document text
    • http://playoz.com/ckfinder/userfiles/files/22555884116.pdfIn PDF document text
    • https://globaltranslation.com/demo/global_translation/beta/userfiles/files/77395032049.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/45469248857.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3961e0e7b---fomulepegizale.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/pusaditujudejavuxiwi.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/388bd829badbbbf5a4d16886aa40c037/10946268608.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/79433669713.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160d6281b30be9---vetisinasanek.pdfIn PDF document text
    • http://poornasreehomeoclinic.com/ckfinder/userfiles/files/14432417621.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbd2f17dfe1---vobixemugituva.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/98801661589.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/c1eef5f3f4c33da379533dff82134fc2/10137253732.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae80235d95---gujez.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/3ckblmc2s9nhjm2894e9tq4ao4/51624536204.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9437e16e69---49218436215.pdfIn PDF document text
    • http://darienhigh69.com/clients/866565/File/97277925313.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/38b6cd25885cb1b48e08201760f14f7b/17148120288.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/b8b2c1465f9af726234dcdcc69585cfc/30835041493.pdfIn PDF document text
    • http://dierenwinkelindex.nl/images/uploads/90541772014.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/jefonewamuni.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D3 10888 bytes
SHA-256: 1440451f97db4361db62ae85fd6ebef25f2817aee1b73f121a66772c126562d2
font_01_sfnt_off0000edf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10608 17608 bytes
SHA-256: 16755f86ba986cda95b0987a7e2579cbda6684f71a7a654cf3d646ab5668d9c6

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