Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22e85b04f56a449…

MALICIOUS

PDF

85.5 KB Created: 2021-03-23 00:17:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 614476d5fc94d9f898d10ddf183c5fe8 SHA-1: d94ebc146b51ece5df601120736f7492406a1dcb SHA-256: c22e85b04f56a449468ae6dad716ec09acfb0625aa9030f6a7e5cbd70064a481
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm designed to distribute malware. The heuristic 'SE_ENABLE_LURE' indicates the document likely instructs the user to enable macros or editing, a common tactic for malware droppers. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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=download+driver+printer+canon+mp258+untuk+windows+10 PDF link annotation
    • http://naliputa.mywebcommunity.org/47061875064.pdfIn PDF document text
    • http://rikuluxolavasig.iblogger.org/92443573723.pdfIn PDF document text
    • http://delozofize.scienceontheweb.net/9360044337.pdfIn PDF document text
    • http://toxusuzom.mypressonline.com/59541646948.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/wutixof.pdfIn PDF document text
    • http://wenatal.getenjoyment.net/caterpillar_diesel_generator_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zetesapoxus.epizy.com/27479966998.pdfIn PDF document text
    • http://lunaxugezejotu.epizy.com/setaze.pdfIn PDF document text
    • http://nodefojabotozij.rf.gd/gepoj.pdfIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_df1d9d18a235430292bf4d15083c779b.pdf?index=trueIn PDF document text
    • https://b3d988c2-7a7d-4c3c-9141-221b6550481e.filesusr.com/ugd/9dda13_ea08bedf724a4efe9eb003627c4b298b.pdf?index=trueIn PDF document text
    • http://woposatet.epizy.com/rafizafunure.pdfIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_ea0ed4cd8cf04981a0039de65763a4f4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3caf37a5-2dc3-49d3-bcc0-838e39c13028/26869839277.pdfIn PDF document text
    • http://talifox.rf.gd/english_idioms_with_meaning_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17325b7e-6c9d-4b2e-88f7-85910db855a1/ap_calculus_multiple_choice_questions_by_topic.pdfIn PDF document text
    • https://6131fb9f-3080-406c-a6ab-c4686b6a2f6f.filesusr.com/ugd/52be6f_7d59484bb02d4d279d769044415f1d07.pdf?index=trueIn PDF document text
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_f3eafec4f86944118f6badab4d2f733f.pdf?index=trueIn PDF document text
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_8781871940424603b8e340b3d48fe9b8.pdf?index=trueIn PDF document text
    • http://jopajenazub.epizy.com/ubuntu_normal_font_free_download.pdfIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_cdba18d29e294e649955de639a027f63.pdf?index=trueIn PDF document text
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_c5cde8a122404ac7a934558721f83146.pdf?index=trueIn PDF document text
    • https://bbcfd6a5-f89b-40cc-85b0-144de5fb26e6.filesusr.com/ugd/9b7d8a_26cd5d514da0444bb3b18669a1c5eff5.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_off00010d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3D 6080 bytes
SHA-256: 6d26aa93036742c76f80e684d279b7b6bd8634766ef7d71c3befa0d71306347c
font_01_sfnt_off00012200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12200 11084 bytes
SHA-256: 8bf8e12b97862308be23318ae9a5cb7993c5582a4bef938d86ee84aa50489722

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