Malicious PDF — malware analysis report

Static analysis result for SHA-256 81b205e33b066205…

MALICIOUS

PDF

77.2 KB Created: 2021-03-24 11:40:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 32f6429e432de9899c0a1ecea244cae1 SHA-1: 2b8d191887dc47a797331a3282fd06d6c72d351b SHA-256: 81b205e33b0662059f9e88e159af9d3e6aac7f899778fc1a6c85377984a23f73
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to an anime review, which is likely a pretext to drive users to the malicious URL. No scripts were extracted, but the presence of external URIs and the high risk score indicate a phishing or malware distribution attempt.

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://vilenefex.ru/strik?utm_term=the+count+of+monte+cristo+anime+review PDF link annotation
    • http://rupazaduxil.mywebcommunity.org/comptia_a_certification_all-in-one_for_dummies.pdfIn PDF document text
    • https://cdn.sqhk.co/dorusafe/gc3aJjj/puzzle_bobble_3do.pdfIn PDF document text
    • http://zakukamupavi.22web.org/sadifufewizikefijofipi.pdfIn PDF document text
    • https://cdn.sqhk.co/guzorata/j0hegih/wusimitewivusiresitere.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zukogi/lease_agreement_sample_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7841b72-dd78-4e03-8343-0f5d98e3dec7/kiwurejavovuk.pdfIn PDF document text
    • http://bajipodi.epizy.com/baldur_s_gate_1_android_apk.pdfIn PDF document text
    • http://kagiwabiluwotel.epizy.com/57994137219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d70f77-d95b-49db-829d-119546832da7/conflict_resolution_strategies_in_nursing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7773c9dd-503d-42e1-bf3a-0f9bbb127546/88246279586.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/walgreens_boots_alliance_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/bhagavathi_tamil_movie_audio_songs.pdfIn PDF document text
    • http://gatoruvizuzil.epizy.com/95984362570.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/4992964115.pdfIn PDF document text
    • http://fevejalamozek.epizy.com/64778862063.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/instructions_for_keurig_2.0_coffee_maker.pdfIn PDF document text
    • http://fufudaloxola.onlinewebshop.net/how_to_install_honeywell_humidifier_filter.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_off0000f1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F2 5188 bytes
SHA-256: e276a27c14e7c99d8229a3d53e0a01f9ebfa690fed38da5a1d55a49cf69c6ad7
font_01_sfnt_off00010383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10383 10836 bytes
SHA-256: 5e3f7b8e8f7db711c2a4cba20198967c8b9c2e0b1a5800fa2116ada63024a5c3

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