Malicious PDF — malware analysis report

Static analysis result for SHA-256 d050c692652f3633…

MALICIOUS

PDF

257.9 KB Created: 2021-04-01 16:36:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d88391b2fa3a4b58cedf92de76c77b9f SHA-1: 1e9781da00ac327bbaccdcceb15bce7e252be9f5 SHA-256: d050c692652f363381fe2f8d4cd53082f4a158bb8342c794f70a1c7459ecb1c9
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.007 JavaScript

This PDF document exhibits multiple social engineering lures, including requests for recovery secrets and prompts to install browser updates, which are common tactics for credential theft and malware delivery. The presence of external URLs suggests it attempts to redirect the user to malicious sites. While no scripts were directly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving a phishing or trojan payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jottigo.ru/aws?utm_term=firefox+45+esr+mac PDF link annotation
    • http://dubunidenore.iblogger.org/24352647201.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/haieShf/speak_now_1_vk.pdfIn PDF document text
    • https://cdn.sqhk.co/rirelolut/gijiIgg/husqvarna_automower_boundary_wire_connectors.pdfIn PDF document text
    • https://kufavugozit.weebly.com/uploads/1/3/5/3/135309998/zibitovikutad.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/Bjejdhg/kritika_the_white_knights_guide.pdfIn PDF document text
    • https://lojizeli.weebly.com/uploads/1/3/3/9/133997115/1a64c486a73.pdfIn PDF document text
    • https://fovevirikat.weebly.com/uploads/1/3/0/7/130775443/giwuxixo.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/a42hdMg/outdoor_cat_furniture_for_sale.pdfIn PDF document text
    • https://vovavurag.weebly.com/uploads/1/3/0/7/130739927/gatavidorufusi_dudotosenolax_sawevaf_zagan.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/qNgh0gf/butufojuzagorasanafize.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1b3fde16-7575-45ba-b40e-8916c64185ca.filesusr.com/ugd/8874e8_233f3e89c95f4f778dd2b9bac6a664eb.pdf?index=trueIn PDF document text
    • https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_59033a0ab2864dc0af119b00b6a044d8.pdf?index=trueIn PDF document text
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_cbaa05605ff948bebffd72918c69b1d4.pdf?index=trueIn PDF document text
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_4d21294ce2f346858e0ac48e9f8bfa74.pdf?index=trueIn PDF document text
    • http://pebulibupa.rf.gd/doxokoj.pdfIn PDF document text
    • http://sabaramofedofi.rf.gd/med_school_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/tupamafosarizamor.pdfIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_45c8922417a4408e8370366d5676a15d.pdf?index=trueIn PDF document text
    • http://tixumupugenatum.epizy.com/b._ed_form_2018_hp.pdfIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_162b86d6fdcc4ff79ead60d2d89d4078.pdf?index=trueIn PDF document text
    • http://pavadujutupa.epizy.com/77579180787.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/39922554129.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_off0003b64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B64C 5228 bytes
SHA-256: 47c7a05a5c7ce8346ed6fd11f975db8993053a12494e200a106f4d1c2b895079
font_01_sfnt_off0003c813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C813 12308 bytes
SHA-256: 6871bd0f0ee6ab949b8e2c07689b092434d0169b52506ee1ed7a6410bcc9f04c
font_02_sfnt_off0003f1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F1E8 1736 bytes
SHA-256: 551918360585b1590efa6fd2a215345b2f702067d151a0e4b48cfa7490b57960

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