Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bfab5102623adcc…

MALICIOUS

PDF

73.0 KB Created: 2021-02-22 20:17:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 98bf9d9addb4ebde5b41aa42beb511f8 SHA-1: c7b347933650c9ef414445abd0b1b7d928de9256 SHA-256: 3bfab5102623adcc5832653cf9290ddcf35e8d929a9f90b579c23eba656f46b2
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body contains a lure related to 'winnie the pooh books' and includes an external URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site or download a payload. The presence of embedded URLs and the ML/ClamAV detections strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jottigo.ru/strik?utm_term=complete+collection+of+winnie+the+pooh+books PDF link annotation
    • http://unlockdeals.shop/magic_bullet_deluxe_manual7cj61.pdfIn PDF document text
    • http://savadaqwe.space/62596715305a7k8h.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/pIidhjj/mind_games_store_manager_salary.pdfIn PDF document text
    • https://cdn.sqhk.co/neratimo/fc95hfO/wikil.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/jhiiays/wakesurfing_mastercraft_x2.pdfIn PDF document text
    • https://cdn.sqhk.co/jakovenuz/igjjagc/15026134886.pdfIn PDF document text
    • http://legionmone.xyz/28204903281dilm1.pdfIn PDF document text
    • https://cdn.sqhk.co/tonufipu/bm8pKh5/71302491044.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvinudubuno/ifgd54m/46166728558.pdfIn PDF document text
    • https://cdn.sqhk.co/wirujurumugi/Dfhbrjb/divarty_fort_carson_address.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/5cicsgd/adderall_side_effects_sweating.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/zesixefe/grammar_checker_free_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/97395790029.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/jiguvewowajufutejotezepa.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/ashilla_zee_apalah_arti_menunggu.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/causes_of_ww1_worksheet_answer_key.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_off0000df32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF32 5148 bytes
SHA-256: 81a8d8b4381234ac12a350f04e777dc192a4dbba34d61f3d7e1bb6ac3554bb5f
font_01_sfnt_off0000f0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A9 11052 bytes
SHA-256: 912e879a94e4da38f9a4217466f6af53c0b3ccb5d7ae38e11e561f4e4f62103e

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