Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f106876bc8aab4…

MALICIOUS

PDF

77.3 KB Created: 2021-04-02 14:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b684d241b1dcba4b267182a2fe6ef433 SHA-1: ddaff2f1f3b8e6395f9a9552f962361ee31e7ffd SHA-256: 66f106876bc8aab4cf65e76099e8ed7fce0f3858ae29d820e13eb418ca275c82
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a malicious domain, likely intended to trick the user into downloading a further malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'George Bernard Shaw' and 'pdf', suggesting a lure for a document download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/award?keyword=george+bernard+shaw+man+and+superman+pdf
    • http://gukabibus.mygamesonline.org/xaguwidojo.pdf
    • http://visionnew.xyz/what_are_the_apa_ethics_codek0f0s.pdf
    • http://raxawevamavox.getenjoyment.net/public_speaking_merit_badge_pamphlet.pdf
    • https://cdn-cms.f-static.net/uploads/4490949/normal_5fe8f7cb37894.pdf
    • https://static.s123-cdn-static.com/uploads/4489595/normal_60026d39c6570.pdf
    • http://a1metromovers.com/779194586hink7.pdf
    • http://foselosen.sportsontheweb.net/68910841119.pdf
    • http://kersita.fun/femadesaa07.pdf
    • http://pewujok.mypressonline.com/action_potential_worksheet.pdf
    • http://rozogididibusar.sportsontheweb.net/learning_teaching_book.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kewetanetoza.atwebpages.com/86162401201.pdf
    • http://zirutabu.myartsonline.com/biohacking_handbook.pdf
    • https://uploads.strikinglycdn.com/files/0022b4f2-5fff-4889-bca2-b7deb7324088/15205750836.pdf
    • http://xidalagep.myartsonline.com/cancer_de_mama_minsa_peru.pdf
    • https://uploads.strikinglycdn.com/files/0127da5a-51fe-4b9a-9205-dbc63b06b620/torapujejobozokujigabub.pdf
    • https://d397443b-80d0-4e74-967c-4ce830ee3754.filesusr.com/ugd/0a76f0_ce089e2862b54315b229902a8349d44a.pdf?index=true
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_d39cdec50a8040969727a3d3094cf280.pdf?index=true
    • https://uploads.strikinglycdn.com/files/31cd4546-7d4a-4d4a-9194-4e8a6ebb23de/32055314632.pdf
    • https://b9264059-5ce6-458a-812b-58b21e0c51d1.filesusr.com/ugd/9a3dc1_d02fd286153d4e37a7b779da633ffeb6.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_off0000f058.bin
4ccc5f8aac5130e4836d98f0bae47a7c726652261c5886f47467ddf5246174d7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF058 5684 bytes
font_01_sfnt_off00010394.bin
10788cf8082a4d1c3a9cca0d7de2a06c690bcdcd9707edffe96b13b4f375ec4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10394 10740 bytes