Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fbc96d352115b79…

MALICIOUS

PDF

70.1 KB Created: 2021-03-23 13:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2816b2a9453734965eeee34fddab275d SHA-1: bbaccb5c80ddf5c702fb8f7036b63ddde174cf24 SHA-256: 5fbc96d352115b79af872ef7e49aa860cbeaef3b4021c36e60a8ec8d3359bedd
124 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The presence of external URIs and callback lures suggests an attempt to trick the user into downloading a malicious payload or engaging with a scam. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/wix?keyword=read+answer+color+label+mitochondria
    • https://ramokazadi.weebly.com/uploads/1/3/4/4/134470245/7627265.pdf
    • http://callup.today/baby_got_back_lyrics_karaokenn2ta.pdf
    • https://cdn.sqhk.co/nolagutotato/ihijevE/25900065038.pdf
    • http://warewakeb.sportsontheweb.net/moxidedaxu.pdf
    • http://rugegav.mywebcommunity.org/ditafizo.pdf
    • https://cdn-cms.f-static.net/uploads/4387036/normal_60220dc38f407.pdf
    • https://newafiramolik.weebly.com/uploads/1/3/1/0/131070062/joluloluvufedosozawe.pdf
    • http://ru-order-687646765445.art/52350333359vwn1g.pdf
    • http://josumewemuzob.getenjoyment.net/vivitozoninamowam.pdf
    • https://static.s123-cdn-static.com/uploads/4391024/normal_5ff7afe436fc3.pdf
    • http://tuvoreda.scienceontheweb.net/52256010152.pdf
    • https://cdn.sqhk.co/jajotulix/jfjhhdw/vector_security_corporate_phone_number.pdf
    • http://mmmmmme.space/80496081039im5pn.pdf
    • https://cdn-cms.f-static.net/uploads/4490252/normal_6038ddde76ae6.pdf
    • http://design-kvartira.info/34802411118lmf2l.pdf
    • http://options.expert/4887222841003y2d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gomaxod/star_trek_next_generation_cast_season_5_episode_19.pdf
    • http://samajusinifako.atwebpages.com/46305920209.pdf
    • https://s3.amazonaws.com/fisulefajow/river_bandits_logo.pdf
    • https://s3.amazonaws.com/jasadavebaga/48344910162.pdf
    • https://s3.amazonaws.com/sonutopexaramuf/how_to_build_simple_lego_gun.pdf
    • https://s3.amazonaws.com/vedexajawo/android_app_developer_fresher_jobs_in_mumbai.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_off0000d4fe.bin
e3ea6410c05ba0361c4324fe4f05e4ddc90e5b676795efc1c49a28f8131ddf27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FE 5420 bytes
font_01_sfnt_off0000e755.bin
5dfcbd5a917df4ccee218df4ba71eea914e1a6a72f5b794d109073dc3fbf10a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE755 10540 bytes

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