Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b523da46f66ddf8…

MALICIOUS

PDF

74.1 KB Created: 2021-01-29 06:39:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d5127a8a91b96ae88cbc375714fee065 SHA-1: dd842cf8d63d0e036438d726f284c08cd9f2b2e6 SHA-256: 4b523da46f66ddf81bb5fc714a0fcff07c6a85f43eb61c80382cb43615cdcc40
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a website disguised as a sheet music download. This URL is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/aws?utm_term=till+there+was+you+sheet+music+scribd PDF link annotation
    • https://cdn.sqhk.co/takularozo/SmheBqe/37701943854.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/hcidKzZ/34641081109.pdfIn PDF document text
    • http://chelamela.org/traduzione_inglese_italiano_documenti72h6b.pdfIn PDF document text
    • http://vknacruckalaikov123.xyz/delegation_authority_templatepl6ut.pdfIn PDF document text
    • http://procripton.com/guwobalugaxemefiwuxola66jvh.pdfIn PDF document text
    • http://grigolia-studio.ru/ten_commandments_twice_removedey5at.pdfIn PDF document text
    • https://cdn.sqhk.co/pejozujemu/iajbBic/assassin_s_creed_identity_apk_mod_offline.pdfIn PDF document text
    • http://denizan.com/lunasirukuty1gpm.pdfIn PDF document text
    • http://waystep.site/muwolawojisavenoruginanavy2u5k.pdfIn PDF document text
    • http://smeshnoykir.space/update_android_9.0_oppo7rphw.pdfIn PDF document text
    • http://kungfumalibu.com/49506074955gqe3o.pdfIn PDF document text
    • http://levelupguild.com/23416253145qn558.pdfIn PDF document text
    • http://8gusevshop.website/petrochemical_engineering_colleges_in_maharashtraz5uqh.pdfIn PDF document text
    • http://myfoxing.online/83271278633qq4eg.pdfIn PDF document text
    • https://cdn.sqhk.co/munoforifuso/hibhaAQ/aliexpress_hair_extensions_clip_in.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://s3.amazonaws.com/fejenijovekozu/fonabirudimowa.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/ascii_character_for_form_feed.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/divisibility_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/bafabusabobudevufifowifuz.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/adjective_examples_in_sentences.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/60417006469.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_off0000cf5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5D 5236 bytes
SHA-256: 5269c26a74c1c90278dc8f8f294492f639e8f1aec1f157be65bd0ab05112bfbb
font_01_sfnt_off0000e131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE131 15452 bytes
SHA-256: 3dfac4367a522dbc987b719d012ea607d997a392c234024672b4463894d5e3c2
font_02_sfnt_off00010cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC7 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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