Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be305817070bbac…

MALICIOUS

PDF

72.0 KB Created: 2021-04-17 19:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b23c01eaf11131265e36d2a776c32bf SHA-1: 27331cb737bb0d569eed6cd5ecc5ade2310114e5 SHA-256: 4be305817070bbacae1a325f0c068d275263a301ac47b7620aa6a3812134deb1
96 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. It contains an embedded URI pointing to 'ponafet.ru', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, contains text related to 'top secret recipes' and download links, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=top+secret+recipes+full+episodes+in+hindi+download+free
    • https://cdn-cms.f-static.net/uploads/4460263/normal_6055449a1461b.pdf
    • https://cdn.sqhk.co/jorubili/YifAjju/smashburger_nutrition_brussel_sprouts.pdf
    • https://cdn.sqhk.co/mejabutumu/hHjdija/42685566292.pdf
    • https://cdn.sqhk.co/letarezetap/jjgcjiX/bluestacks_hd_app_player.pdf
    • https://cdn-cms.f-static.net/uploads/4468534/normal_604904fb0c27a.pdf
    • https://cdn.sqhk.co/vuzowadijavu/44zgfhj/21745547692.pdf
    • https://static.s123-cdn-static.com/uploads/4370063/normal_5fdfb3b8815c3.pdf
    • https://cdn-cms.f-static.net/uploads/4375884/normal_602cad7525f0d.pdf
    • https://cdn-cms.f-static.net/uploads/4454040/normal_60322e60ef8cf.pdf
    • https://cdn.sqhk.co/nivunufozub/dKniQ8d/mebofezelopa.pdf
    • https://static.s123-cdn-static.com/uploads/4485305/normal_5ff17eedda9c4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bupesejirijejus/how_to_title_a_biology_lab_report.pdf
    • https://s3.amazonaws.com/mefadedosuw/marlin_336c_review_2018.pdf
    • https://s3.amazonaws.com/jifedefujodu/candy_crush_jelly_saga_apk.pdf
    • https://s3.amazonaws.com/kovibu/31397405587.pdf
    • https://s3.amazonaws.com/genijusemu/veripomo.pdf
    • https://s3.amazonaws.com/sukedil/zivonodidatozamigax.pdf
    • https://uploads.strikinglycdn.com/files/d97e865b-87f6-42e6-85c1-1fab149b6755/wepidixitijadaradoxarow.pdf
    • https://uploads.strikinglycdn.com/files/51299363-8fd3-43e0-923d-f08bd93b4fd1/bagasedi.pdf
    • https://s3.amazonaws.com/tesodagiwor/48258855469.pdf
    • https://s3.amazonaws.com/sulasatevirexo/91246304152.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbbb.bin
4bf6242ebd79274ae75b4b7674436c6e0ffa436f2ca85bafe298e9fd9287860a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBB 5284 bytes
font_01_sfnt_off0000edbb.bin
2abea74fa2f2990989359e44d28330007e76dcfc7be26acf935e4b295d985bb5
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBB 10684 bytes