Malicious PDF — malware analysis report

Static analysis result for SHA-256 65cbe746d3f58333…

MALICIOUS

PDF

72.5 KB Created: 2021-05-30 20:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18949d139187def531dc5f5b24bd7298 SHA-1: 78b262b31eaf2f4f50dcd789decc02049bc06053 SHA-256: 65cbe746d3f5833349b3f354b9a06ca34938c6fff8d5ddea3c69d28f6ee86bb8
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it is designed to trick users into visiting a malicious site.

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://jacksth.ru/strik?utm_term=naledi+his+love+book+3+pdf+download
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5fd64647cc053.pdf
    • https://cdn-cms.f-static.net/uploads/4494648/normal_605717bf85162.pdf
    • https://static.s123-cdn-static.com/uploads/4401973/normal_5ff60f91cccaf.pdf
    • https://cdn-cms.f-static.net/uploads/4402721/normal_606aa68cd1884.pdf
    • https://static.s123-cdn-static.com/uploads/4487918/normal_60002e0d2e5ac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bb75fbb3-acd5-47cb-98bd-06b0b01cec53/zisuvapasetubuw.pdf
    • https://uploads.strikinglycdn.com/files/1896f2cf-b9e6-4cae-a7c4-42c05ea9b126/xanofosuranelivu.pdf
    • https://uploads.strikinglycdn.com/files/53291959-3145-4119-90fe-3a3c27e6bbfa/risufimafirepoxude.pdf
    • https://uploads.strikinglycdn.com/files/e9b80bdd-01a3-4980-a304-0f7835580e02/viper_lc3_4706v_installation.pdf
    • https://uploads.strikinglycdn.com/files/cd251715-9e7a-47c8-9681-d24202b8743e/22326490828.pdf
    • https://uploads.strikinglycdn.com/files/d660eae8-5220-41dc-ab66-70cf581de53b/contabilidad_de_costos_concepto_importancia_y_clasificacion.pdf
    • https://uploads.strikinglycdn.com/files/f9f8d177-ad63-446d-b130-8f724fd24032/yellow_button_on_logitech_k400_plus.pdf
    • https://uploads.strikinglycdn.com/files/5430b11b-0b72-46ed-a433-6142b69433da/how_to_set_up_smok_rpm40.pdf
    • https://uploads.strikinglycdn.com/files/5a95d9f6-efa7-42e0-b60f-eb5b3bce64f4/garmin_zumo_660_gps_review.pdf
    • https://uploads.strikinglycdn.com/files/a193cc83-6a11-457a-ad06-0ca5fe39211f/repagiridugev.pdf
    • https://uploads.strikinglycdn.com/files/989b22b2-39bf-4573-b108-e1b627233791/the_woman_in_the_window_release_date_2021.pdf
    • https://uploads.strikinglycdn.com/files/03a63a95-e7ca-42a8-8b5f-5e37e9276316/bobexifodi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d166.bin
3a99bfcc8a6322cb1f5d9dd0c76c95525b0630114fc12c53a342d41e6b6e0e01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD166 2960 bytes
font_01_sfnt_off0000dbd6.bin
009cbf9db62c43d3b22b8461b41474f9b8763b1bf46f0f98ac7d2e4c5a2252f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD6 5524 bytes
font_02_sfnt_off0000eeb2.bin
3c865edc563b60898b92eb651f87016b3eaca7cb719a7d6681ae85a5e2021924		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB2 10700 bytes

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