Malicious PDF — malware analysis report

Static analysis result for SHA-256 85284087fada70b0…

MALICIOUS

PDF

75.6 KB Created: 2021-03-01 08:42:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3cf4ae01e117984aa007a413d5b5ec54 SHA-1: 8e9d5bae9cc9481cc90f950d14ce46ddb9f99091 SHA-256: 85284087fada70b04bc876f51348e1621f28cbdf6f2e5037021b0b6770756d4f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'zajinet.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to 'Willy Wonka and the Chocolate Factory' and 'wkhtmltopdf', suggesting a lure to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://zajinet.ru/strik?utm_term=willy+wonka+and+the+chocolate+factory+opening+scene PDF link annotation
    • http://pedagodogiko.getenjoyment.net/rerem.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/who_is_the_poorest_man_alive.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/f4ieehZ/64873103661.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/69894409281.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/gjbhdig/personajes_de_la_novela_teresa_nombres.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/too_lazy_or_too_lazy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vajowevub.epizy.com/46488760913.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/how_to_fix_tv_with_no_picture_but_has_sound.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/frozen_movie_audio_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/guia_de_supervivencia_urbana.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/47186832778.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/81382350178.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/maferuvotumenoloxeda.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/85975396597.pdfIn PDF document text
    • http://fovuxux.rf.gd/82474816852.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/explain_data_warehouse_and_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/83847535147.pdfIn PDF document text
    • http://zogosugo.onlinewebshop.net/diresejosalebutusavuvaza.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88E 5688 bytes
SHA-256: d140ff9b973dd343afcf3281d56a29d573781321f8d2fe05ac52369a017691b9
font_01_sfnt_off0000fc09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC09 10928 bytes
SHA-256: c58f7d0ff3bc3cd756813a4d466f15a4d9a27ce2a1e4c17c2af4421a0b2b6ddf

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