Malicious PDF — malware analysis report

Static analysis result for SHA-256 24c91f091fbe52b1…

MALICIOUS

PDF

91.8 KB Created: 2021-03-08 00:47:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 948ac993c0bc8d66b8b08980daeaf372 SHA-1: 4a5e6e3c664c4f7d61d40601cd4355e95e1c5f09 SHA-256: 24c91f091fbe52b13f2a8bb4b3ca56804e003a2bd0b4e34ef96233c35ec468dd
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing lure designed to redirect users to malicious content.

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://zajinet.ru/strik?utm_term=virginia+woolf+best+books+to+read PDF link annotation
    • http://openlait.pro/philips_cucina_blender_manualpndcp.pdfIn PDF document text
    • http://losqutoq.online/zisulomee0bmm.pdfIn PDF document text
    • https://jobajepefo.weebly.com/uploads/1/3/1/4/131482915/109780.pdfIn PDF document text
    • https://cdn.sqhk.co/sofaxuleruri/id1jhHc/jobamasudoravetu.pdfIn PDF document text
    • https://cdn.sqhk.co/morureju/jggf7ji/sad_status_video_song_tamil_download.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/can_you_cook_a_standing_rib_roast_in_a_pressure_cooker.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/pWhdgif/maths_online_games_shoot_em_up.pdfIn PDF document text
    • http://chelamela.org/14760349313r3gtp.pdfIn PDF document text
    • https://pavovebowejimop.weebly.com/uploads/1/3/1/6/131607108/6777771.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zasuwunal.myartsonline.com/zitakuzati.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/85730471245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6df837cf-0d16-4495-b1be-ad058791d095/an_american_experience_poisoners_handbook_video_questions_answers.pdfIn PDF document text
    • http://jagomizaf.atwebpages.com/tesul.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/discogs_review_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/gafirekudinowatap.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/kanutasupoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be08003-43f7-4886-927d-8e26443cb4a7/vukukuludoxuvurag.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB1 5124 bytes
SHA-256: 2b5ae23caa9e92e04e333976dbbfb1fa10d8b3b5e83bab6c9028f4cd71f2e3b9
font_01_sfnt_off00012f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3C 11216 bytes
SHA-256: 773787206294eff851db9ca45e59dc18c8ceb280aea138379a9728da1aa52a67
font_02_sfnt_off00015440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15440 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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