Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f60fdfff5acb88…

MALICIOUS

PDF

93.7 KB Created: 2021-03-03 02:45:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 86c3ded1662878dfd6ae8bf08433f324 SHA-1: e52ae6a3622d64acff1ced0ff3535293fde70774 SHA-256: 26f60fdfff5acb88eb98f18e19a77ebd1bc703334af7a5c0e72630fb898fd1d0
126 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a phishing or trojan distribution attempt. It contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains keywords related to game mods, aligning with the external URLs that also reference game mod APKs. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support the conclusion that this document is part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/wix?keyword=dbz+dokkan+battle+jp+mod+apk+4.7.0 PDF link annotation
    • http://ninuxalezopo.getenjoyment.net/woxudikolipa.pdfIn PDF document text
    • https://cdn.sqhk.co/lokabawopup/i1JhhDk/how_to_fix_yellow_keyboard_keys.pdfIn PDF document text
    • http://detonic-buy.website/vuniwamusatanakenuj09yix.pdfIn PDF document text
    • http://ladujose.sportsontheweb.net/distributed_systems_books_quora.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/how_to_list_multiple_possessive_nouns.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/89094221990.pdfIn PDF document text
    • http://hocostyle.ru/faxesaxalpls1.pdfIn PDF document text
    • http://visionnew.xyz/fukulixakebulunonofc3.pdfIn PDF document text
    • http://bestsaleshopin.xyz/weniremipisigul43o1o.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/3260984693.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vejegaba.atwebpages.com/folokid.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/gatalaxefaxozapo.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/loudest_roblox_sound_id_ever.pdfIn PDF document text
    • http://vigavanoxe.onlinewebshop.net/private_practice_season_6_episode_1_full_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/son_chiraiya_song_raagtune.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/font_awesome_4._7_icons_cheatsheet.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE49 4364 bytes
SHA-256: 14eb62fc7f6fce5034844a30514cc2040c81aa98c6956d26bef5c0c9ad2c3bbd
font_01_sfnt_off00010da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA1 5500 bytes
SHA-256: cc2383694b33a6a3d6095293578b359f035b342daaf85fa9528401cbf6968139
font_02_sfnt_off0001206c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206C 16072 bytes
SHA-256: 51f739e69ba5ce03fd9ba7094b189cb727019db5ef4452f646e84b540728fd1c
font_03_sfnt_off000152de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152DE 16416 bytes
SHA-256: b1a7be413c16529a3efb36790fb1ede9dbc47b99b1dcf399fe3ce16d881d47c9

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