Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e93e4c5134069e…

MALICIOUS

PDF

82.3 KB Created: 2021-03-16 01:07:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15a73545ffe931867f8b19111e47a058 SHA-1: 704d140b0fe46bf36f8d1b31bac4c176620d7a1c SHA-256: 65e93e4c5134069ea261db0ffec8a9ad89ab2c89f622b889349102badd1a47b6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many of which point to PDF files, suggesting a link farm or redirection mechanism. The primary malicious URL identified is https://lozipotod.ru/wix?keyword=sd70acu+vs+sd90mac, which is likely used to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/wix?keyword=sd70acu+vs+sd90mac
    • https://gisonegeviwobi.weebly.com/uploads/1/3/1/3/131383673/zedopoxuxiz-tilivimezigo-musidopaf-sejosifina.pdf
    • https://lafozevu.weebly.com/uploads/1/3/4/3/134378288/21fad9305.pdf
    • http://qlemelest.online/356328318o3iy1.pdf
    • http://wonder-ita.space/www_njmvc_gov_en_espaol_preguntasbodcu.pdf
    • http://vedice.ru/81381484100hg5n4.pdf
    • https://bigeriburaline.weebly.com/uploads/1/3/4/3/134334921/rilunumo.pdf
    • http://mon-cmso.best/dell_b2375dnf_tonerl4lnn.pdf
    • http://mebets.xyz/7516895179843aev.pdf
    • http://moresukko.ru/towenibinivusonamujiderolfh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_e810cc3c3e0c4654b83dd729f09351b6.pdf?index=true
    • https://b724dda4-e2e0-47c5-811c-ae3b7273578b.filesusr.com/ugd/a1e5ee_92b40d69b16d40f1ab4ed9846ec9b7b5.pdf?index=true
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_3691145ca80b491b9380a6d7f6435323.pdf?index=true
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_4d54e69b93314f08990408dbc1443f8a.pdf?index=true
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_6d7fcc27256f4be4bd9fa59203bd041a.pdf?index=true
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_77c1f83aa49c425ab04b3979e9614cdc.pdf?index=true
    • https://c07b3cb0-7d4a-4e65-9c62-eb3bd0ce3b6b.filesusr.com/ugd/7560d5_77ffc59fb055482da6e841d151317732.pdf?index=true
    • https://a24bc4ef-4ee2-4fae-af0c-c9fea810b245.filesusr.com/ugd/67d96c_17f99343fd8340c9a9473fb8894ac7ed.pdf?index=true
    • https://e57d8632-f742-4524-ada6-9cdf759d9f13.filesusr.com/ugd/b0cb2d_597d308b3c3a43c5b7dd24c01487f0ba.pdf?index=true
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_fd0f8ab361e846c6a05d7283f03f7a5f.pdf?index=true
    • 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_off000101f7.bin
4af3888e7dd2839d4790cf3d21ec5200bc2a851457cf8c8b3054b91affec6f93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101F7 5496 bytes
font_01_sfnt_off000114ab.bin
3eb474bc9974ee61efc5cebd311131b0a0b40f1beea49ded55fac171583f76b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114AB 11260 bytes

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