Malicious PDF — malware analysis report

Static analysis result for SHA-256 531daabad9dee63a…

MALICIOUS

PDF

90.8 KB Created: 2021-02-22 12:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 57f61b5f1115252f9be2fcb319de70bd SHA-1: 3f3702177254ec1f9f364b8570b755d47ca19034 SHA-256: 531daabad9dee63a485fdb314afb5ffd94e9ad73831919e9047b6e8c2001be1c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs to a suspicious domain, likely serving as a lure for the user to click. The document body, though heavily obfuscated, contains text related to 'Denon avr 1712 remote', suggesting a phishing pretext.

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://crophysi.ru/strik?utm_term=denon+avr+1712+remote PDF link annotation
    • https://cdn.sqhk.co/pasivuzuke/hcgijju/best_war_movies_on_prime_video.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/hjmPgc5/58473854860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407084/normal_5fd272f24ce83.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/gjicBhj/94054881422.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452395/normal_5ffe8c63e6f9b.pdfIn PDF document text
    • http://freds.space/tisinagofomalafuke9swob.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/tIjjLhb/vertigo_music_in_ratched.pdfIn PDF document text
    • https://cdn.sqhk.co/linotepibubi/eTr1hdy/video_downloader_app_for_youtube_iphone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464541/normal_5ff6b60a8323a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480880/normal_5fdc950cd03d2.pdfIn PDF document text
    • https://cdn.sqhk.co/feletitami/P7ejgib/rawukavova.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5fdc469d94435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410030/normal_602d86e4cb560.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425908/normal_5fee9722ad7e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gewopebij.epizy.com/94620392823.pdfIn PDF document text
    • http://jizagedades.rf.gd/call_of_duty_ghosts_code.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12711 4944 bytes
SHA-256: a20ae3d023facfd338263802d752c6e4026a4173cd46b39b1a43c9cb0583346f
font_01_sfnt_off000137e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E3 11256 bytes
SHA-256: 38884c10be8b1c722f43f5f0fe36909ae3a3097cadba3a901d7daf3ce6d6fa4b

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