Malicious PDF — malware analysis report

Static analysis result for SHA-256 726d42446a48d839…

MALICIOUS

PDF

90.9 KB Created: 2021-04-02 18:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa88febe0ca68df2ac3d07a490c3b8be SHA-1: 23f7b6bf2b3f8e3c2710cf08cb745f8401a6d779 SHA-256: 726d42446a48d8395876719431f2db6211bfd7dd99bdfbd732005825417ab2de
136 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains suspicious links, including one that is invisible and points to a potentially malicious domain, designed to lure users into downloading further malware. The document body, though heavily obfuscated, references a 'Kenmore 800 dryer parts manual' as a pretext for the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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/strik?utm_term=kenmore+800+dryer+parts+manual
    • https://static.s123-cdn-static.com/uploads/4390069/normal_5fdce3fb2c586.pdf
    • http://bavewemelemare.iblogger.org/platform_ajay_devgan.pdf
    • http://zumewidife.mygamesonline.org/metal_gear_solid_3_boss_speech.pdf
    • https://cdn-cms.f-static.net/uploads/4368219/normal_60584c79a8317.pdf
    • https://cdn-cms.f-static.net/uploads/4384460/normal_605404a32f662.pdf
    • http://bobixina.getenjoyment.net/15366258644.pdf
    • http://gekodejevotug.medianewsonline.com/72836594347.pdf
    • https://cdn-cms.f-static.net/uploads/4500911/normal_60451470e052f.pdf
    • https://cdn-cms.f-static.net/uploads/4383921/normal_603bc03dcbb3f.pdf
    • http://ig-supportcenter.xyz/45138662926jltj0.pdf
    • http://rubyshup.space/jokuzowidatofikijidib4wfe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bavatesivo.myartsonline.com/bright_futures_parent_handout.pdf
    • http://sadozejeko.myartsonline.com/human_behaviour_psychology_facts.pdf
    • http://datuzijopo.epizy.com/serutaxopijoxajepezowe.pdf
    • http://mivogunav.rf.gd/vtech_phone_answering_machine_not_working.pdf
    • http://remofexemuja.rf.gd/ralip.pdf
    • http://mudopijafaj.epizy.com/41952341865.pdf
    • http://bujovozojavisi.rf.gd/68892350599.pdf
    • http://jojulupijawide.onlinewebshop.net/35373707636.pdf
    • http://redireleposagoz.rf.gd/mechanical_engineering_projects.pdf
    • http://sujosivetobifir.epizy.com/how_to_use_yamaha_ypao.pdf
    • http://sojufuka.atwebpages.com/google_mapreduce_paper.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_off00012324.bin
c582b0ee76bed9892b820dff9565d07d393b1a19fbf1f0fff05ddb34d5739414		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12324 5512 bytes
font_01_sfnt_off000135d3.bin
a16313b2e098d234b7d505cd61561de540f8de074dbc54ba3ec62b1d29c72323		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135D3 11320 bytes

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