Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49c83b3bcfd3dcd…

MALICIOUS

PDF

77.9 KB Created: 2021-03-24 03:44:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51aee40bd1968c66a1d1e51aa1509d28 SHA-1: ec48579a76155fd07ab26c5ac66af325784d7d7f SHA-256: d49c83b3bcfd3dcd873dc3c9b9187bb6c17b9f3a2c5526d53e512b0ebb6969db
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, appears to contain metadata related to product reviews and application details, suggesting a lure to a malicious website. No scripts were extracted, but the presence of external URIs and the overall detection by security tools indicate a phishing or malware distribution attempt.

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://mezovuduw.ru/aws?utm_term=pentair+easy+touch+8+reviews
    • http://rolivazugatar.scienceontheweb.net/do_you_capitalize_than_in_a_title.pdf
    • http://gtomishebs.xyz/44634443658xz1xe.pdf
    • http://leziwazedo.mypressonline.com/learn_python_3_the_hard_way_download.pdf
    • https://nerapusu.weebly.com/uploads/1/3/1/4/131438180/vujanokuzovamewud.pdf
    • http://immorta-cross1.club/majalubusizuledopiguwopi2vln4.pdf
    • https://fotagajumiveba.weebly.com/uploads/1/3/1/4/131411987/c87381d8fbb.pdf
    • http://form-lnstagramverifiedbadges.com/best_meme_gifskeo0b.pdf
    • http://sokfresh.fun/mejifowijogefibusulavrrhs6.pdf
    • http://kiwenalod.medianewsonline.com/muzagatadeliwolofaker.pdf
    • http://storeyou.store/83755934626vhcd6.pdf
    • http://xalapuzim.sportsontheweb.net/libro_budismo_zen_y_psicoanalisis.pdf
    • http://trokot-shopnew.online/bioassay_development_guidelinesjc9zf.pdf
    • https://cdn.sqhk.co/lefuwaregew/hgXmhj8/highway_patrol_school_nc.pdf
    • http://hydraruzxpnew4af.exchange/peavey_bandit_112_blue_stripeqvaj9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3bc3bf32-94de-40db-bdaf-c186e1f4fdb7/50959253636.pdf
    • http://pimimozoji.myartsonline.com/spelling_activities_year_6.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_off0000f359.bin
8b1b6e124e750ad1c9684e5d0a3298661be59c3076554e04b289de7db0b9737d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF359 5304 bytes
font_01_sfnt_off00010579.bin
c2575ba6fafbd8bacf5091bc3890f6d523c8ac77f25b30d6fa2ead41b819fa7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10579 11076 bytes

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