Malicious PDF — malware analysis report

Static analysis result for SHA-256 9958d9972a875943…

MALICIOUS

PDF

66.6 KB Created: 2021-03-30 00:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c94598d3877adf6ada180ae0a1a8090c SHA-1: bebe6075879b760e7e7ebee0595e417935a0fdaf SHA-256: 9958d9972a875943b8f82de959e9c0e8bff30d42a109abe482f6b1fb4213a33c
136 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a password-protected archive lure. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest a malicious intent to trick the user into downloading and opening a concealed payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://botokaw.ru/wix?keyword=th8110r1008+manual+espa%25C3%25B1ol
    • https://cdn.sqhk.co/vovewotutal/25hbhgE/speed_boat_racing_near_me.pdf
    • https://cdn.sqhk.co/vasibejovej/dQhhjit/fijuvibojukaxoku.pdf
    • http://xugerovogubex.22web.org/35797965964.pdf
    • https://cdn.sqhk.co/patizuruf/ic7Tun1/96516085294.pdf
    • http://gedadekenoz.mywebcommunity.org/adverbial_phrase.pdf
    • https://cdn.sqhk.co/gutemokerezo/jduhg9X/judonapenugeresamixirebu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zuses/wozixaxonodagasezuno.pdf
    • http://letituxis.epizy.com/chalice_rune_guide_destiny_2.pdf
    • https://uploads.strikinglycdn.com/files/005aa463-82cc-4817-b479-827078e2f3f8/4241637583.pdf
    • https://uploads.strikinglycdn.com/files/19305d53-edfb-45c6-a487-6ff8ce0ad546/matlab_function_handle_properties.pdf
    • https://s3.amazonaws.com/minabiwa/how_to_write_an_introduction_for_a_law_essay.pdf
    • https://s3.amazonaws.com/nojemi/corona_kerosene_heater_sx-b21a_manual.pdf
    • http://nuvebabe.atwebpages.com/wifozixotomebiduvugazera.pdf
    • https://uploads.strikinglycdn.com/files/98762cd8-c1f9-44dd-8965-04681c782e3a/topics_in_algebraic_combinatorics.pdf
    • http://nubirumoxid.onlinewebshop.net/17402729211.pdf
    • https://s3.amazonaws.com/guxosa/do_you_get_a_certificate_of_divorce_uk.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5af.bin
768ee215fec1b531b44827b0f0e8432f72d245459f786cd4a1dee398b1a31491
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AF 5608 bytes
font_01_sfnt_off0000d84f.bin
3cce69a3ec695f910731b559223bada1db2721cd0917b502631fb71d510c7534
pdf-font-stream PDF embedded font (sfnt) at offset 0xD84F 10456 bytes