Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c0b140265d97503…

MALICIOUS

PDF

85.5 KB Created: 2021-03-10 02:23:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 99f917e4baf0c2085fcfec540a986c19 SHA-1: 57b562f383ef235e82c2c52e16e43eef2418a49b SHA-256: 5c0b140265d9750336673509284db8c712d6432aa6456936b1e6789c3428467f
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 identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely used to host a phishing page or deliver a secondary payload. The document body, though heavily obfuscated, contains keywords related to 'license log book pdf' and application metadata, suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=aiff+d+license+log+book+pdf PDF link annotation
    • https://cdn.sqhk.co/jadojibam/qghllgf/64947198402.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367644/normal_600adbc408090.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376601/normal_5fdf66d87d68d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385206/normal_5ff9d4298d2ea.pdfIn PDF document text
    • http://gizovivomiz.getenjoyment.net/lumosuni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416661/normal_5fe7959ceee07.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/hqQBDUJ/jipojujifapejagaguzubomi.pdfIn PDF document text
    • http://gulonibujivul.iblogger.org/po_box_application_form_dubai.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/jaifjh7/text_font_generator_encode_messages_pro_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384152/normal_5ff4e7284b132.pdfIn PDF document text
    • https://cdn.sqhk.co/kotoweraga/ixv6ic1/toxagur.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/hg3hijc/french_nail_styles_2019.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/27d5e2a7-008e-47c0-880a-8428a41d87b0/naxipugumogoxinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb0fd11-2ffc-49bc-ab29-6a4b57eca5cd/lumepaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f743d20e-27ae-4b7c-bba9-b4d99643e854/9427678100.pdfIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_5ff107acd2954947afc0e26f358ece9e.pdf?index=trueIn PDF document text
    • http://xefejada.epizy.com/69202960976.pdfIn PDF document text
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_a84ba584da0245a1b02e980ac9ff1c42.pdf?index=trueIn PDF document text
    • https://8ed6bd9f-de2b-4923-b7df-82f95eb18a03.filesusr.com/ugd/7fa32f_1983226ba7294906b1e1cfadae501175.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/59efcb90-c5f2-44a9-b582-2347cc04ea8e/lights_out_2013_movie.pdfIn PDF document text
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_900ee76cac3c494a9ce3db4db55cce8b.pdf?index=trueIn PDF document text
    • http://dulibifusarumo.rf.gd/hp_photosmart_6510_printhead_cleaning.pdfIn PDF document text
    • http://ralirajuz.atwebpages.com/15157886625.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE520 3136 bytes
SHA-256: da9227d803687063f66cf7dfa78de1ee905a540eef857ffc4d92688b8418ee34
font_01_sfnt_off0000f04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04C 5208 bytes
SHA-256: 92102acd617a3f23bfb932448ab8ffb5632b8e825b8d6d811921142ccac22880
font_02_sfnt_off0001021c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021C 3364 bytes
SHA-256: 99e8c3924b0f0cd9cd832cd8bcfd30e122e06f01bbed1675becf0f848ac366e4
font_03_sfnt_off00010fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA1 10152 bytes
SHA-256: 744dc503fc390aeb3ca17404ab075482b2b6b995d41becaf8f3f30f9e10b5daf
font_04_sfnt_off00013299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13299 16080 bytes
SHA-256: 38beb2f786712ff3c0412b627d20919d04d32b1c0a378a463352f2b9fe275e60

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