Malicious PDF — malware analysis report

Static analysis result for SHA-256 42294aa74c8ea74f…

MALICIOUS

PDF

89.5 KB Created: 2021-03-15 21:43:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: d7dd78e9f3b725abbe1c9ff58011e4bd SHA-1: 45405a0bdc8f3c5ddb2940d3c6f98485c523fed3 SHA-256: 42294aa74c8ea74f7bd232f3170ab25579664044a26fa54a11bef51c671f1e72
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and heuristic detections indicating it is a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to technical issues, supporting a pretext for the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=genie+intellicode+keypad+not+working PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453100/normal_5ffea7ad7a847.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/ijPkZhj/dasofuwivo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449177/normal_5ff05e56598a0.pdfIn PDF document text
    • https://cdn.sqhk.co/didatife/8FgcPmX/jimebimoteb.pdfIn PDF document text
    • http://tesazidon.22web.org/xesus.pdfIn PDF document text
    • https://cdn.sqhk.co/jerowerar/9Rvie00/key_leadership_skills_for_project_managers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/34c61af8-fa14-42eb-907f-2a6941f2e82d/semadikakasubi.pdfIn PDF document text
    • http://lezegunotoxom.rf.gd/blood_stains_on_bed_sheets_causes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b142471e-1d04-4cef-bd3a-9fab0540e81a/haier_portable_air_conditioner_10000_btu_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee7ffdf6-260e-4ce5-85c3-66289ac7d698/what_is_english_101_like_in_college.pdfIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_faf316be090f4b1ab4d2bd1095e20aa9.pdf?index=trueIn PDF document text
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_082a233aedf4401baeceee4626067213.pdf?index=trueIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_1aa9ff600a874439b818b970d83b5dcd.pdf?index=trueIn PDF document text
    • https://2061f665-9309-41a6-981d-137229ee7e60.filesusr.com/ugd/eb2fe6_3d7ba2dbed7441cb9c45a1eb66788236.pdf?index=trueIn PDF document text
    • https://b6e49935-6d58-4bde-831f-6e0b746776d3.filesusr.com/ugd/7d321f_43f2cac2c7d447cf9f0255cd2c193bb0.pdf?index=trueIn PDF document text
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_668d8d79cb6a4725a18ff4f7c4cb69e0.pdf?index=trueIn PDF document text
    • http://xemubekimivimed.epizy.com/gw2_fractal_cm_guide.pdfIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_f6faf73231ee48ed9b6b1724391ca1d0.pdf?index=trueIn PDF document text
    • http://lunuganuxik.epizy.com/19055719513.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_off00011149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11149 5140 bytes
SHA-256: ca75d6e487bb7f9af0577b69d445636ceaec08785de8d949ae9cbb5cbe220a23
font_01_sfnt_off000122f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F2 11568 bytes
SHA-256: 1e5ff17ada7da7b05d38279bc23368b1188357fc39fb25f8b0b493796799a752
font_02_sfnt_off00014a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A38 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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