Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af69c7560d4e353…

MALICIOUS

PDF

85.6 KB Created: 2021-04-08 08:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd29410cf28f0b0869b0b12980b086b3 SHA-1: 51ebd7611cba7ab961a1fac57d9cd58e1b58be1e SHA-256: 1af69c7560d4e35360f580859661830394a5f164ab387169349c79ed4176edaa
166 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. The presence of numerous external URIs, including those on disposable hosting, further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/123?utm_term=bootstrap+css+form+design+example
    • http://liko-sneakers.com/the_cloud_of_unknowing_and_the_book_of_privy_counseling7k35w.pdf
    • https://cdn.sqhk.co/rijizedot/Qoyige3/sikitanipefarumadoxi.pdf
    • http://naturalm.space/cambridge_checkpoint_maths_coursebook_8aj0y8.pdf
    • http://walotapedaz.iblogger.org/mathematics_for_economics_and_business_free_download.pdf
    • http://titoto.xyz/62204278094j7g87.pdf
    • http://medtechnika1.ru/warhammer_40k_8th_edition_ork_codex_vke00sm.pdf
    • http://yatvoyya.fun/lajunolotutiverosobojlqe9l.pdf
    • http://fishland.store/loopsie_pro_apk_without_watermarku8vt3.pdf
    • http://usacreditscore.info/how_to_pair_baby_monitor_motorola6fbfb.pdf
    • https://cdn.sqhk.co/pavupaken/halBiaq/electronic_probe_holder.pdf
    • http://luminar2-download.xyz/elmo_fire_pumpkin_templatem7iwy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/baxunaf/66304817425.pdf
    • https://s3.amazonaws.com/niporofez/tratado_de_aggayu.pdf
    • https://s3.amazonaws.com/donake/dell_latitude_7490_repair_manual.pdf
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_4b02349481854b628c573698953c325f.pdf?index=true
    • http://kutifakibidi.rf.gd/35786115675.pdf
    • https://d85b1738-a471-4043-b59e-116b2bb794a3.filesusr.com/ugd/97927e_f2ad608675bb4628b407bf8d80748277.pdf?index=true
    • 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_off00010c95.bin
7ed7552bff28f2d0cf92f07eef208eefbc677d2e1a02ff0a6d5bea3ffb5fec5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C95 5592 bytes
font_01_sfnt_off00011f8e.bin
79276b7fbda1ec14c711b837293a69c0fd62dbd2082bcffc39948fe20b5d7d4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8E 12176 bytes

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