Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e2531e12876ac8…

MALICIOUS

PDF

93.4 KB Created: 2021-04-19 16:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dec4a512a37a916c2fca5268135100a5 SHA-1: 747cd10ac48a449b7c9c0934e5ac32231806d574 SHA-256: 40e2531e12876ac857362a247176c4d21fe324bd802d7945e5a00d9fffcb5357
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The presence of a 'Clipboard command execution lure' indicates the document likely instructs the user to copy and paste commands into a shell, a common technique for downloading and executing secondary payloads. The embedded URLs suggest a link farm or phishing attempt, with 'https://ponafet.ru/strik?utm_term=docker+command+list+files' being a primary indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://ponafet.ru/strik?utm_term=docker+command+list+files
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/monofaki.pdf
    • https://dumuzuvo.weebly.com/uploads/1/3/4/6/134695275/969d022b4d.pdf
    • http://linavaluviriv.getenjoyment.net/representative_government_in_modern_europe.pdf
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/b0aaac5b65ca83.pdf
    • https://lakupofudeb.weebly.com/uploads/1/3/0/7/130775354/gixoja.pdf
    • http://simopuvoramawu.mywebcommunity.org/vimana_shastra_by_bhardwaj_rishi_in_english.pdf
    • http://nubatevujonuw.mygamesonline.org/38411890620.pdf
    • https://deremorukoj.weebly.com/uploads/1/3/4/4/134490203/9437642.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kusokexefutaj.epizy.com/application_of_genetic_engineering_in_animals.pdf
    • https://12879e5c-81de-4786-8c60-abd434996022.filesusr.com/ugd/4cd51e_e5fe72504a3346ba8af159cf38d9a905.pdf?index=true
    • https://s3.amazonaws.com/besafefaf/51599165653.pdf
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_8495b2a54a73421292d40ca7b905aaeb.pdf?index=true
    • http://tibamupebunod.atwebpages.com/misux.pdf
    • https://s3.amazonaws.com/fizup/liwete.pdf
    • http://janalusexisowa.epizy.com/landlord_lease_template_texas.pdf
    • https://87da31d5-d184-45e7-a456-0ad082c8bd65.filesusr.com/ugd/55e94a_66b8f3fe267f456dac1128d9a78faa6c.pdf?index=true
    • https://s3.amazonaws.com/xuxifuzituwu/tijunulejizogod.pdf
    • https://s3.amazonaws.com/kefiperizonofu/8637453021.pdf
    • https://f3ea461b-95fd-44cf-949c-5afda193840f.filesusr.com/ugd/a48928_1e67d89974e0460c9f6fb895a94835ff.pdf?index=true
    • https://s3.amazonaws.com/jemazejodep/pokapulivezovawuxirivev.pdf
    • https://s3.amazonaws.com/wazotojemov/voxadalamukasaw.pdf
    • https://7c3dd69e-6649-485e-b385-36acc2971cd6.filesusr.com/ugd/cf9ff1_805ddf76b0094fe9a4337595ef965902.pdf?index=true
    • http://bowukedogatowo.epizy.com/84049814301.pdf
    • http://jimatisejur.rf.gd/converting_household_measurements_worksheets.pdf
    • http://nufulavidibime.myartsonline.com/steinway_piano_buyer_s_guide.pdf
    • https://s3.amazonaws.com/tobobowu/deutsch_na_klar_6th_edition_workbook.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012436.bin
ba84ccc26a01f870a63a029bd0ecf32cceb4149fa3d669d1a46362e524fe1c09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12436 5016 bytes
font_01_sfnt_off00013522.bin
d390c8219a80f30053570de1e1f98344b85dd24a5d6b5271fc8272f728e10384		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13522 11072 bytes
font_02_sfnt_off00015af2.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15AF2 4324 bytes

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