Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d8dd0825e096e0…

MALICIOUS

PDF

81.2 KB Created: 2021-03-16 08:55:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c052b903cffcb1b60cf6539ffaadcb12 SHA-1: 5bcaac7a86dc8dd9dfb1fe21ce3791cf9c2d38b9 SHA-256: a8d8dd0825e096e0da8ee1e0163af0d1fb2251279692a20b13e5ce67150932be
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm designed to redirect users to malicious content. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://resalured.ru/123?utm_term=acrylic+mirror+sheet+philippines PDF link annotation
    • http://lokubakodo.getenjoyment.net/35976439339.pdfIn PDF document text
    • http://ig-support-service.com/fifty_shades_of_grey_online_amazon_primeeet32.pdfIn PDF document text
    • http://mattelipsticks.site/dihybrid_cross_worksheet_answer_key_miceplxyc.pdfIn PDF document text
    • http://excschool.ru/33573429033k0igv.pdfIn PDF document text
    • http://goldotzyv.ru/old_hobart_welderk0r18.pdfIn PDF document text
    • http://degakak.sportsontheweb.net/51644746231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501645/normal_5fd5f5346a324.pdfIn PDF document text
    • http://lg-supportteam.com/trane_xv90_service_manuala5q4i.pdfIn PDF document text
    • http://sodaapp.pro/twinkle_twinkle_little_star_recorder_sheet_music0e57c.pdfIn PDF document text
    • http://lisolu.org/emergency_contact_form_template_uk834ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380076/normal_5fc978b59e2f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412763/normal_5fcdf911d01f1.pdfIn PDF document text
    • https://ligofaxudatejot.weebly.com/uploads/1/3/0/7/130739538/4747382.pdfIn PDF document text
    • http://dkblogin-de.best/jufijil5mujr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388177/normal_6010e69995533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453732/normal_601306fdacf8c.pdfIn PDF document text
    • http://pedalini.club/how_to_webripd6oqe.pdfIn PDF document text
    • http://intereriia.com/how_to_make_steak_tartareopfaf.pdfIn PDF document text
    • https://zamivevi.weebly.com/uploads/1/3/1/4/131437513/velilotixideluv-bapog-fudejur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_bfa0ea2a318d43af9e01c4818592d404.pdf?index=trueIn PDF document text
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_95b402aa13a84ebcbbaca0a5e77d65f6.pdf?index=trueIn PDF document text
    • http://vexabimumemig.atwebpages.com/separating_john_updike.pdfIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_1dccbe4c96d049f0b64b46863837470b.pdf?index=trueIn PDF document text
    • https://dce579ed-4708-43c3-aaeb-2c76a6268d78.filesusr.com/ugd/944939_055b601e3b7740fe9b2c02f78f12968e.pdf?index=trueIn PDF document text
    • https://9eff4bf0-55a5-42b9-a65a-250f23c32afd.filesusr.com/ugd/80978b_e1a5736fcfe945789572e671f90911d4.pdf?index=trueIn 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
    • 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_off0000e8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A9 5056 bytes
SHA-256: 070109a41473417a470bb58d6ad92d7c8fa42f263c8e7bfb145676da34e41d5a
font_01_sfnt_off0000f9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BB 11368 bytes
SHA-256: 6e91eec4c1f3171407c9c19afd09d4736c46cfb95316ef5f953044242aa75879
font_02_sfnt_off000120bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BD 16036 bytes
SHA-256: 149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1