Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ef009ce16216ad…

MALICIOUS

PDF

90.8 KB Created: 2021-03-24 15:53:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f758c51bf6729860f5893b42ef45dcc0 SHA-1: b4e6b805bd2f9e8834e44a1bc128c5ad0a119cef SHA-256: 15ef009ce16216ad0627db331fc3ac89ba5161d0a1a2ffef5701306a8eafa5c6
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting it. The document body, though heavily obfuscated, suggests a lure related to a book title, aligning with phishing tactics.

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://vilenefex.ru/strik?utm_term=the+book+of+dragons+edith+nesbit PDF link annotation
    • https://cdn.sqhk.co/konidadelan/SieoLBx/sandeep_maheshwari_wiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406228/normal_605042b9a4f1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388612/normal_604ad6e2d276a.pdfIn PDF document text
    • https://cdn.sqhk.co/kebokeregim/9ieijhd/firefighting_supertanker_services.pdfIn PDF document text
    • https://cdn.sqhk.co/pogezasamu/9hdcjiJ/beli_pulsa_listrik_dari_jenius.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405194/normal_60542e92deee5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402710/normal_5ff41a07b382b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/77a0f356-3d53-4d07-9a70-9896e86fc14a/tepopekavupon.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/bifapofafaw.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/26170000096.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/clash_royale_quiz_all_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/jemisupibet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c634bcf0-917d-41a0-b9a7-0543149fee85/79368694511.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/nayak_assamese_movie_video_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/188792c5-ebc8-4d2b-a3cd-97d28240e13f/rugubipurelilosonevewo.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/antemortem_vs_postmortem_clot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad1b4b88-eba7-4e79-a5d8-d9f1ddf4c406/49733744944.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/21309796973.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/79427353836.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/dispatch_note_template.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_off00012538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12538 5288 bytes
SHA-256: 790edb7223f2aa96c7e2dfd8cdb990c79e0e4a3b356ea4f9b722ea669d3f550d
font_01_sfnt_off0001372e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1372E 11768 bytes
SHA-256: 9ef56c68b96fac1c3424ccd224581fef71317255ce3481fcc42e54f5ca62325a

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