Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d727ce07df9900…

MALICIOUS

PDF

181.6 KB Created: 2021-05-12 18:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1959006bed115631ef29bab526158d44 SHA-1: 420f2c82fbda3863416b470f1ef847ac709c1a7e SHA-256: d3d727ce07df990033a07ec1bc6e871ff1a66858311261bac4d589e571a459d0
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, contains text related to 'What isekai character am i', suggesting a lure. Numerous external URIs were extracted, with a primary suspicious URL pointing to a domain associated with a phishing or malware distribution campaign. The presence of embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further support the conclusion that this document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://gimoguvi.ru/strik?utm_term=what+isekai+character+am+i PDF link annotation
    • http://xofofumireke.mypressonline.com/62554349367.pdfIn PDF document text
    • http://mastera-saydinga.ru/mr_majnu_bengali_subtitlestyrna.pdfIn PDF document text
    • http://mukuwasoveta.sportsontheweb.net/bijusekenil.pdfIn PDF document text
    • http://getyourcredit.info/misisebarikafopawuxigmvxg4.pdfIn PDF document text
    • http://discout.online/61083224583jutyn.pdfIn PDF document text
    • http://boketizabujig.scienceontheweb.net/freckle_juice_movie_poster.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/rocket_mass_heater_for_sale.pdfIn PDF document text
    • http://tosemuzariku.iblogger.org/autumn_leaves_guitar.pdfIn PDF document text
    • http://vumejopiraxu.mywebcommunity.org/vitelis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuwutexo.onlinewebshop.net/wefikebafazumuwewojer.pdfIn PDF document text
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_2136078cb740428c896274e176134edf.pdf?index=trueIn PDF document text
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_b07626c10a51414ca9e5a8cdf039effa.pdf?index=trueIn PDF document text
    • http://riwexakax.epizy.com/miwefubagev.pdfIn PDF document text
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_3f790865a01c4b2491e026b517651ba6.pdf?index=trueIn PDF document text
    • https://be8d9ae9-445e-4c8e-be9d-a08f5bb2c2ca.filesusr.com/ugd/8b97dd_ca0e0f84eae94794a07eaf90da4d8841.pdf?index=trueIn PDF document text
    • https://72cdfa97-b5fe-44cc-9aa9-3142b5aa642a.filesusr.com/ugd/ee32c9_fdb87b03453548c1bb9d8918180f104f.pdf?index=trueIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_d2f1af3701914d6ab9d7b199595320fb.pdf?index=trueIn PDF document text
    • http://lofimezil.rf.gd/bulamunanapunufojugig.pdfIn PDF document text
    • http://liwusetokabozil.epizy.com/63468600205.pdfIn PDF document text
    • http://boxitevu.rf.gd/xojeduribonikalojan.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000262d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x262D1 11700 bytes
SHA-256: b598ad91059dbe4fec46df2e2e853a03e228b80dd0fb689b1b88d54b0ac8db52
font_01_sfnt_off000288cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x288CD 5084 bytes
SHA-256: 4a76d247a7fb9b2ebfd8ab37b9dc941a343e892ad11e7f25236506a912dda090
font_02_sfnt_off000299f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x299F8 13576 bytes
SHA-256: 47420f10fe4dc313d87fa743a6c0881c10b745692a9e157b2d7f8c87a5216256

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