Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02dc8a030e7a071…

MALICIOUS

PDF

70.4 KB Created: 2021-03-13 18:04:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d9e1219f506b212480f161a0e0b36722 SHA-1: b13af8460b5361ee83cdbf28a0d4e1e71b886665 SHA-256: f02dc8a030e7a071fd304e8d9dd7b5dbb41cefae7301a1ca8ed2f99bbd2d0680
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'dugedepap.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a title suggesting it's a manual, likely a lure.

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://dugedepap.ru/123?utm_term=cadillac+ats+2015+manual PDF link annotation
    • http://ketoxitigojaluk.sportsontheweb.net/red_cross_first_aid_courses_saskatoon.pdfIn PDF document text
    • http://vudifabofugejij.medianewsonline.com/how_to_reset_a_flame_rollout_switch.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/toxuwikinejagulena.pdfIn PDF document text
    • http://pibarulajido.getenjoyment.net/fibamavujizitefuz.pdfIn PDF document text
    • https://jofudetazowus.weebly.com/uploads/1/3/1/6/131606688/begoke.pdfIn PDF document text
    • https://kufojinelimipi.weebly.com/uploads/1/3/0/7/130776518/xenuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buzanuziti.myartsonline.com/is_gta_5_going_to_be_on_ps5.pdfIn PDF document text
    • http://sugamane.onlinewebshop.net/ludup.pdfIn PDF document text
    • https://680e7e7f-99bb-4309-8a01-ecc910dc7690.filesusr.com/ugd/717a42_899c9a4143bb4ecfb15c08d086212249.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fe16c7f-1b2d-4122-b73c-68d9d0e13406/lusabijujebinexajewijoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6908315a-14a7-4399-904a-55526b5f8e36/how_to_put_film_in_a_600_polaroid_camera.pdfIn PDF document text
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_83f60afae0b844c08a92d1019e7862f1.pdf?index=trueIn PDF document text
    • http://nitubak.atwebpages.com/moluluzuzaluru.pdfIn PDF document text
    • https://a6132035-7465-4fe4-be4e-2faa96c22dab.filesusr.com/ugd/cf950b_becdee2c70ec45a9b07ce0ec3a8b489a.pdf?index=trueIn PDF document text
    • http://wegugoleta.onlinewebshop.net/30888612889.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/65350816353.pdfIn PDF document text
    • http://kuwijiti.myartsonline.com/loxozem.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_off0000d556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD556 5344 bytes
SHA-256: 830e31ded1cf57fe11778ab30a0849f1f6d345f0728e7727cb06f394baf92563
font_01_sfnt_off0000e776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE776 10784 bytes
SHA-256: 0d45960f033164df9cd92dc76fbd5afc2e3442079b3e37393d85082325b1fb1c

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