Malicious PDF — malware analysis report

Static analysis result for SHA-256 439207a4adf29205…

MALICIOUS

PDF

75.6 KB Created: 2021-04-28 21:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15e209aa40f7069e531c0c7994e15775 SHA-1: 9f25b37825f37e3cf9b76acffe7c0244baa4b6a7 SHA-256: 439207a4adf292056c81d753818136498d1a6917eea6735e0c1747a33d087118
116 Risk Score

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 URI pointing to a URL that appears to be a lure for downloading a driver, suggesting a social engineering attack. The presence of PDF_GOTO_REMOTE indicates an attempt to redirect the user to external content, likely malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote GoTo action medium PDF_GOTO_REMOTE
    PDF references a remote or embedded document via GoToR/GoToE with an extension-less or unresolved target
  • 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://ponafet.ru/strik?utm_term=hp+laserjet+4+plus+windows+7+64+bit+driver
    • https://sufevibuxaka.weebly.com/uploads/1/3/2/7/132712301/332592edf5.pdf
    • https://jinidodax.weebly.com/uploads/1/3/0/9/130969434/gutesef.pdf
    • http://domsale.xyz/my_biddeford_blanket_controller_wont_turn_on6nr0t.pdf
    • http://tatuvidara.iblogger.org/nosurapamamajaxi.pdf
    • http://somamorizeti.iblogger.org/figeledipumebexoves.pdf
    • http://momentshop.website/doxugoxaremeyjx5v.pdf
    • http://zigejetulanoda.iblogger.org/omo_see_aunty_wey_mumu.pdf
    • http://hookup668.site/pewomokiritijirekedajuliq3gm3.pdf
    • https://jeketivogusu.weebly.com/uploads/1/3/1/3/131398097/fedibubipasinababaso.pdf
    • http://marketes.pro/the_luck_uglies_book_2tzzd6.pdf
    • http://xatujazaxuta.iblogger.org/gotor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gisobugiwe.rf.gd/47013813679.pdf
    • http://dujofaxuro.rf.gd/guided_tours_of_ireland_for_young_adults.pdf
    • http://pupekafujobuda.rf.gd/mezawonusarelimofovuvi.pdf
    • https://b6d28218-96ba-4f98-b9c1-0d78b4e6fe84.filesusr.com/ugd/47aa88_3c6d4e7278e34a3a90c9f2bdeb9940d2.pdf?index=true
    • http://wumuduwowuwi.rf.gd/avatar_the_last_airbender_comics_the_search.pdf
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_a5c35335037f42a29ad869722ac6bbbd.pdf?index=true
    • http://pogitijerilux.epizy.com/eraser_apk_app.pdf
    • http://lobaman.epizy.com/molepazilenotakuki.pdf
    • https://ce099f17-eb12-430b-a452-8d789b3ee5a8.filesusr.com/ugd/aef5b7_71c1cee083754be0ac61035bbc417b2b.pdf?index=true
    • http://faxupinunuwup.epizy.com/adventskalender_basteln_vorlagen.pdf
    • http://xumerapugegivo.epizy.com/tewodopodevinu.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_off0000e7ed.bin
3d4b062554cde192ef014f23b5496e8c94f565e70d1a00a3289cb2b0fd323f53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7ED 5604 bytes
font_01_sfnt_off0000fb28.bin
14fc9b2b9607e87a37e68593e1f81deed1c7a67f8dec8661ac46c7318e636953		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB28 11064 bytes

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