Malicious PDF — malware analysis report

Static analysis result for SHA-256 388e96e26739ca67…

MALICIOUS

PDF

78.7 KB Created: 2021-04-30 09:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18238ed02303819924d750b35997e9f0 SHA-1: 83599e3ff9d56a8609acb53be5b03f428a6235ce SHA-256: 388e96e26739ca6717357c4ede52fb4602c846e0a6eee94cf9b222b85a756ca1
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a site hosting malware or phishing content. The document body, though heavily obfuscated, contains text related to search terms, reinforcing 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://kuzutuzo.ru/strik?utm_term=beatles+easy+piano+sheet+music
    • http://muzidos.iblogger.org/zebidofinexip.pdf
    • https://cdn-cms.f-static.net/uploads/4446499/normal_600cf0f5e0788.pdf
    • http://bagevelotalapam.22web.org/pogosiwomivam.pdf
    • https://cdn-cms.f-static.net/uploads/4453720/normal_6019fa6d598e7.pdf
    • https://static.s123-cdn-static.com/uploads/4380380/normal_6004ceb1e189e.pdf
    • https://cdn-cms.f-static.net/uploads/4401697/normal_602e019d3a33d.pdf
    • http://zifosazoniduve.22web.org/35181751745.pdf
    • http://avtoshtorki.shop/73093887226n15bz.pdf
    • https://static.s123-cdn-static.com/uploads/4391605/normal_5fe3f46de81ba.pdf
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdf
    • http://datingsexchat.site/vega_tools_llce6syn.pdf
    • http://stingeksoj.online/95301598345w59gc.pdf
    • https://cdn-cms.f-static.net/uploads/4492257/normal_605c6fc37e5f8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fogivezin.rf.gd/35186107394.pdf
    • https://uploads.strikinglycdn.com/files/ab55366f-8af2-4882-9306-76264c8ed06e/98376231435.pdf
    • http://tagogegipuz.epizy.com/78490448156.pdf
    • http://gokutirimavav.rf.gd/ler_cinquenta_tons_de_liberdade.pdf
    • https://uploads.strikinglycdn.com/files/dc4ff7d5-b15a-43dc-8d9b-05c05ff2c891/klipsch_promedia_2.1_bluetooth_how_to_connect.pdf
    • http://nowuzapifara.rf.gd/cyclone_jaz_dhami_new_song.pdf
    • http://xikisefux.epizy.com/wawawamavubadirotewe.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_off0000e7ba.bin
9e580f5805d09adff2e60fc8c10cea7e317264750a4808a28f5ff66a68386403		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BA 5108 bytes
font_01_sfnt_off0000f8f2.bin
3a05ef00b63e2094ddec03d790d779bf89a7bec7f568e002cb740ce47beb40a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F2 11384 bytes
font_02_sfnt_off00011f30.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F30 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.