Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60ee763b29a5406…

MALICIOUS

PDF

71.8 KB Created: 2021-03-19 14:06:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 69064577dcc11df73419fe48c8dbf0fe SHA-1: 3fa7685c72326224aca998299d74d3b606c705e2 SHA-256: f60ee763b29a540699565afc9a0efbf1fdc43f3931cf1a08f4483343af86e47a
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The presence of 'cmd.pdf' in the document text and the ML classifier's high confidence score further indicate malicious intent. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://nipisod.ru/wix?keyword=etrian+odyssey+untold+guide PDF link annotation
    • https://cdn.sqhk.co/nugizape/ff8jfT0/gravity_skydiving_gmbh.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/igdggid/64275623234.pdfIn PDF document text
    • https://cdn.sqhk.co/bezupidokaz/RQgjqfP/how_to_play_solitaire_pyramid.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/nYYeiie/kuxuzasavitital.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/G6Xjjid/ginigonebilutugo.pdfIn PDF document text
    • https://petabururumeje.weebly.com/uploads/1/3/4/9/134902787/turonoxawofeno-vejetolufagifi-sikesofobaso-vegufajililezu.pdfIn PDF document text
    • http://verezitabel.66ghz.com/mikagoviwegekeve.pdfIn PDF document text
    • https://pofunowiri.weebly.com/uploads/1/3/3/9/133997400/tebitasitav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mokamoba/2011_malibu_thermostat_location.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/advanced_dd_5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/196e1c85-2b36-41fc-877a-ffb2437efc0e/mimegolakupop.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/radireratidis.pdfIn PDF document text
    • http://fakuzilezozo.epizy.com/74211137924.pdfIn PDF document text
    • http://zaxesagujudiwa.epizy.com/battery_report_windows_7_cmd.pdfIn PDF document text
    • http://nekodigeteremi.rf.gd/sheet_street_vacancies_in_cape_town.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36a527a5-bf45-48c0-abe7-be8acd1103c1/is_betting_profitable.pdfIn macro / runtime command snippet
    • https://uploads.strikinglycdn.com/files/02e1f699-4d21-4294-9b58-b660f87a485d/wifoxetotebapa.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/how_much_do_sociologists_majors_make.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/is_mortal_instruments_on_hulu.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/sumerian_cuneiform_translation_english.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://nekodigeteremi.rf.gd/sheet_street_vacancies_iIn macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB5 5052 bytes
SHA-256: f5a3b93aed41c8c58aab10fefb2ba94e2be7cea724f43dc98b108980c0ad57c1
font_01_sfnt_off0000ecfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFE 10864 bytes
SHA-256: e35635edcd2472cf707ee4197c9657c37536b0c4946d22200ecdb61faf62d94f

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