Malicious PDF — malware analysis report

Static analysis result for SHA-256 a333bb4bf0f76093…

MALICIOUS

PDF

69.5 KB Created: 2021-03-14 18:08:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6d06344415e92f1bf35b8f6de579c94 SHA-1: 727db3b917b4631571fc05058701c7c311878c05 SHA-256: a333bb4bf0f76093293627b1bd37c21581ac4846536c2595218e3bc2b32af3ee
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a user manual for a Kindle device, a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs suggests the document is designed to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/award?keyword=kindle+fire+hd+8+6th+generation+user+manual+pdf
    • http://rixorevu.getenjoyment.net/54908310883.pdf
    • http://promooffer.site/how_to_add_custom_cards_in_cards_against_humanityouf9v.pdf
    • https://cdn.sqhk.co/boxepupovemu/sje5hgi/18923338052.pdf
    • http://futajef.medianewsonline.com/dalexijadavufiwuragov.pdf
    • http://fakaripeti.xyz/29274956765zn25j.pdf
    • http://pifemukopisare.sportsontheweb.net/concise_encyclopedia_of_computer_science.pdf
    • http://gixapedotamerow.mywebcommunity.org/veselep.pdf
    • http://mnatural.space/collection_manager_roles_and_responsibilitiessc8b8.pdf
    • https://cdn.sqhk.co/jurugaguvedu/F0XKijK/first_aid_beauty_reviews_acne.pdf
    • http://fobativ.mywebcommunity.org/beginner_pirates_of_the_caribbean_piano_notes_with_letters.pdf
    • http://gepopusoka.mypressonline.com/53879918206.pdf
    • http://cuzinfo.ru/zovudatibugufutosenovum4mey.pdf
    • https://cdn.sqhk.co/fefavezevir/gdZJCjj/desiree_clary_book.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a0f1d9c0-ea46-4e0e-9383-d87711d3127f.filesusr.com/ugd/1e3fb7_ea507e5c20074e92a7c2e44470d7178e.pdf?index=true
    • http://gonegexunu.myartsonline.com/gusawumakevexugukulotojuw.pdf
    • https://a2214900-82f6-4ed5-a432-d5ffd14110fa.filesusr.com/ugd/306b6b_37605a10502143868aec65a165e1983e.pdf?index=true
    • http://zikoliduxa.atwebpages.com/19886910556.pdf
    • http://jowokepo.atwebpages.com/juwavajebaxupejovofamemek.pdf
    • https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_06b0c4af4ec94b1c9cf9f5e890295f06.pdf?index=true
    • 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_off0000d1b3.bin
f3261faa5723ff56ae26cc39d773584e35ccbb059d41dd4311695c7c8053e064
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B3 5772 bytes
font_01_sfnt_off0000e537.bin
72829cb1ee26d0d9d6d03ebda5bee0d929ad6fa0a731fbe0bae6db747fd25688
pdf-font-stream PDF embedded font (sfnt) at offset 0xE537 10296 bytes