Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdedcfd814acac02…

MALICIOUS

PDF

82.7 KB Created: 2021-03-24 04:01:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1338d0c2aba82c897fab9cd155c054f6 SHA-1: 9e935da2f9725443898233d30256a437a48a74ab SHA-256: fdedcfd814acac02b576998f45cb10ebc4213392e23c03212ddafb7b3d84f12b
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious and potentially phishing-related. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a title that could be a lure, indicating an attempt to disguise malicious intent. No scripts were extracted, but the presence of many external URIs suggests the PDF is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/aws?utm_term=pathfinder+witch+guide+archetypes PDF link annotation
    • http://sunshop.pro/givexokexidopezizedok3bb1.pdfIn PDF document text
    • http://rasipafus.getenjoyment.net/13869075251.pdfIn PDF document text
    • http://wonder-ita.space/30392846179a6jhl.pdfIn PDF document text
    • http://eslife.pro/what_is_29_hand_in_cribbagemv4za.pdfIn PDF document text
    • http://zutumufedige.getenjoyment.net/37425918796.pdfIn PDF document text
    • https://cdn.sqhk.co/xasurila/sjg1Mcy/pba_bowling_playoffs_2020_bracket.pdfIn PDF document text
    • https://cdn.sqhk.co/midipijikami/Jyhjsyy/ketutubugununajagob.pdfIn PDF document text
    • http://design-kvartira.info/super_city_building_game_mod_apk_unlimited_everythingoge3c.pdfIn PDF document text
    • http://vulgargirls.fun/vray_3.6_for_3ds_max_2019_free_download_with_cracklph8n.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzudulo/heihhga/12664613130.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_12bd978bbc9d4621b6cab6d033852cb8.pdf?index=trueIn PDF document text
    • http://wodowepakimeko.onlinewebshop.net/bengali_thriller_books_free_download.pdfIn PDF document text
    • https://92923600-264c-4cb8-9d87-181083d4f0d6.filesusr.com/ugd/0bf43f_6f7b2152c45b4a9ba24cf368f9aa672c.pdf?index=trueIn PDF document text
    • http://boromepi.rf.gd/84040978880.pdfIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_e26508cc6e7c4142bb06deacc4c08a9e.pdf?index=trueIn PDF document text
    • http://femejuzi.epizy.com/47768392906.pdfIn PDF document text
    • http://dibesenowox.epizy.com/conjuntivitis_bacteriana_aguda.pdfIn PDF document text
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_1aa5faa14d944736942e5bcd01739e42.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10413 5580 bytes
SHA-256: 2e124bdee150e4b839ac71fb0a7d79ac1ba4536226154a064895061fc62e4ab2
font_01_sfnt_off00011727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11727 10820 bytes
SHA-256: 126a918792579246f014e349a7b68c2d8e1e360a8b0a8fbbb61993333962e823

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