Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4f48d03780ac889…

MALICIOUS

PDF

78.7 KB Created: 2021-03-20 10:51:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 62dda987e23b33cac02b2e75ddcc6177 SHA-1: 93710d88224377532aa21ab8eec740f2c03280d0 SHA-256: e4f48d03780ac8891ec52ca0b110e7d2fa626fbf602038891654ead69b396d3c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs, such as https://mezovuduw.ru/wix?keyword=kensei+monk+5e+build, are likely used to redirect users to phishing sites or download further malicious content. The PDF structure and numerous external links suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/wix?keyword=kensei+monk+5e+build PDF link annotation
    • http://vaxisezawoged.scienceontheweb.net/fasasom.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/jarapijuvuslu1.pdfIn PDF document text
    • http://complerbnp.com/petsafe_wireless_fence_collar_replacement_parts972kv.pdfIn PDF document text
    • https://cdn.sqhk.co/vizinifum/jhifWhh/6653436372.pdfIn PDF document text
    • http://poroda.site/zelagenugajuravuvor6uhxb.pdfIn PDF document text
    • http://reduslimitaly-official.site/vibodajexo5f77r.pdfIn PDF document text
    • http://am-sound.ru/ford_mustang_workshop_manual_downloadmnxvj.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/tiwuzilafuxajenanaxuta.pdfIn PDF document text
    • http://idealicacolumbia.site/bagufarupircci3.pdfIn PDF document text
    • http://fb-ig-violation.com/75336713189xk221.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/Khejxj1/pojidew.pdfIn PDF document text
    • http://rusakova.space/60043142977jkns.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0e5cf71-864f-4e8f-8e2d-658e90a91531/zebra_label_printer_gk420d_calibration.pdfIn PDF document text
    • http://rijonitapadon.myartsonline.com/41350978372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5fc38cd-9a1c-4895-8ea7-9da64f21d2e9/fojudabazujodobaju.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/67370849183.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/irregular_nouns_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/kidde_kn-coeg-3_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1da22a94-cd74-49b8-9b6c-2745ac5f95d7/27200394145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5dccdcc-7fbc-48fd-a52a-607df1b21b16/bpsc.bih.nic.in_admit_card.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80F 4960 bytes
SHA-256: a1a59c439ccae2cd9ce0f2a3b05c046badefff88d4082a02e4a65383a9495809
font_01_sfnt_off000108e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E5 10796 bytes
SHA-256: df163d795a7fd66fe8870610b7f7fcd1c8de95aa8aa14aeb4eb5ff5bdefe5b26

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