Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a3e85169dce78ca…

MALICIOUS

PDF

80.1 KB Created: 2021-05-13 07:25:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d75860d68711ce192c5c582b571c3a9a SHA-1: b12290cc83827b61b04604d70d8c77d09e7c2edb SHA-256: 5a3e85169dce78ca3d30bc1a377aefb28a7630a10c76bafdf521634fe670a2be
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one prominent URL leading to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://jumiwimov.ru/strik?utm_term=is+the+canon+pixma+mg2500+a+wireless+printer PDF link annotation
    • http://beliyden.xyz/cheat_india_movie_ringtone_pagalworld7k2h2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449392/normal_5ff37ab1697e6.pdfIn PDF document text
    • https://cdn.sqhk.co/lekibapufe/cgdrPj3/75400703785.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388432/normal_5fc860674550d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408323/normal_6048969bf2e8e.pdfIn PDF document text
    • http://pogadai.xyz/658813187808kj0a.pdfIn PDF document text
    • https://cdn.sqhk.co/mapiwoda/hTsgchc/80394288345.pdfIn PDF document text
    • https://cdn.sqhk.co/nevupediwix/fgeic1v/mcdonalds_breakfast_menu_oatmeal_nutrition.pdfIn PDF document text
    • https://cdn.sqhk.co/sogunixe/fYdxWij/jebiwevamamudomanokexubim.pdfIn PDF document text
    • http://carinsusa.info/supernatural_bedtime_stories_full_cast3qzor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403418/normal_5fdd355496d23.pdfIn PDF document text
    • http://o-karte-kopilka.com/84607197806xhucd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486963/normal_6035a12d836ed.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/jfgczBA/58618519640.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nonabafat/teri_aakhya_ka_kajal_bhojpuri_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8543f44-d501-4a60-8bc9-49420627c03c/introduction_to_java_programming_11th_edition_exercise_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/venn_diagram_math_question.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdfda3dc-18d5-420c-a3da-8323ce27aaa8/58406242386.pdfIn PDF document text
    • https://b27aca93-056c-4dd2-83a6-fd909c9f709d.filesusr.com/ugd/2ba3ac_8d9f11d2f2694ab98dbf9efc4c1d97f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zidenigad/kajavoponibevijopimin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/749c3e3e-a818-4cba-b5bc-f3dabdbb5866/lobawilu.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/difference_between_badger_5_and_badger_500_garbage_disposal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a86f963e-8722-41d9-9b03-51dce377a5fc/what_is_the_5_love_languages_mean.pdfIn PDF document text
    • https://a9f3490c-def6-45ea-9957-aefa341d54bd.filesusr.com/ugd/84b587_87d5199fadf64756b87ee2f1e6f5bc9a.pdf?index=trueIn PDF document text
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_0ca6941884524befba0054690da2d829.pdf?index=trueIn PDF document text
    • https://c335e157-9962-4e43-983a-f5fcf491c4e2.filesusr.com/ugd/a09b09_88760c33867f456a8e211d9bfa8d5d72.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/97942298296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8beee305-6ee8-4ab8-b6e9-149a303968fd/xifutegibeba.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_off0000f913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF913 5844 bytes
SHA-256: acf50bcb8715e9adb5b8053d9cc0c5837eb55aa0ce5785ec64f42fc31ba9fddd
font_01_sfnt_off00010cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEF 10880 bytes
SHA-256: 71ffb4f5d1a106f6065618e3a132df26fedc0f24a092c1ebd30bd575fb3da4e9

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