Malicious PDF — malware analysis report

Static analysis result for SHA-256 199f2d8cbf3878d2…

MALICIOUS

PDF

78.1 KB Created: 2021-03-28 16:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7af8f83eb093c9c3e2133dfb9ee2abd1 SHA-1: df2c659fcebc3afa2013a49ac97958b38df9af68 SHA-256: 199f2d8cbf3878d2cd58adc859720218c40cbdbbb6b7c8ca47698ab41fb501a7
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The embedded URL and document body suggest a lure related to downloading drivers for Dell Optiplex 9010, likely to trick users into visiting a malicious site. No scripts were extracted, but the presence of external URIs points to a potential download or redirection to a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=dell+optiplex+9010+drivers
    • http://xuxuxib.iblogger.org/what_are_some_behavioral_competencies.pdf
    • http://13millions-warzone.store/computer_systems_a_programmer27s_perspective_3rd_free_downloady5wgb.pdf
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/2dbd4a984.pdf
    • http://koprovk.xyz/when_is_power_book_ii_ghost_coming_back_ondw1sh.pdf
    • https://weligolujevis.weebly.com/uploads/1/3/4/7/134748453/3e543b4c905d0e.pdf
    • https://rofibefis.weebly.com/uploads/1/3/4/1/134131293/7951235.pdf
    • http://prizinsta24.online/nikixuzuwxb4xe.pdf
    • http://creamwalls.online/gupuzonepuomed0.pdf
    • http://matrixbicycles.com/41255494291kcsw6.pdf
    • http://medway24.com/interior_design_jobs_salary_uk45eak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_ac8eec82584e4a88b965a23e38bb6af4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0a5ab9d3-93b9-47a1-a40a-a8a5088e0dbe/how_to_reset_technicolor_modem.pdf
    • https://uploads.strikinglycdn.com/files/dd43a7a1-3dbe-495c-bd3b-b9806b1200c6/axe_pomade_review.pdf
    • https://baad1762-ad72-434c-be9a-9de7d8068d01.filesusr.com/ugd/61395f_a8bb9dd984e14bcdbb8aa4521ca8007f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2b8429a1-8c68-49d3-a7cb-2ffadf4b5ce0/99299047689.pdf
    • https://1f53f175-067f-4140-b001-f66bebc9855b.filesusr.com/ugd/c711d8_b36ff81a70d0419f9d6c434e4aca4673.pdf?index=true
    • http://deseruti.rf.gd/rolawowuvepene.pdf
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_3e9271cee815445ca7e98a1e82dfdfb8.pdf?index=true
    • https://a19d597f-2220-41b3-9459-688249e8a20b.filesusr.com/ugd/f19f53_08f24b1fe070447a8598343030a8ed15.pdf?index=true
    • 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_off0000e920.bin
ae8b7d6ec6146fae0a3eba05ec3fb1747bd0daaffbe595b77f8ee886ae2dabe9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE920 4900 bytes
font_01_sfnt_off0000f9f3.bin
13849d855aacab4a22fd56647f93b9019aebb55646ab6ccfc89f353de0c01731		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F3 10272 bytes
font_02_sfnt_off00011d19.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D19 4324 bytes

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