Malicious PDF — malware analysis report

Static analysis result for SHA-256 e259c8f521dec7f7…

MALICIOUS

PDF

75.5 KB Created: 2021-02-21 22:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb936c90d2f8b30b6f3a47687fa40c50 SHA-1: 7e1d9d6ca05572419b138aefe1634c8edf31e92b SHA-256: e259c8f521dec7f7d0d63410597d37eda0a4aaff2a09d84a2e90c5a88a06c3e0
104 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a payload or visiting a phishing site. The presence of a 'download button' heuristic further supports a social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://bologen.ru/strik?utm_term=how+to+work+out+interior+angles+of+polygon
    • https://mogatuzutixu.weebly.com/uploads/1/3/4/6/134684840/jawikubow.pdf
    • https://vigijamavo.weebly.com/uploads/1/3/0/9/130968937/janufatuge.pdf
    • http://xekokikimelaf.iblogger.org/83097337783.pdf
    • http://hrushch.space/pufarodamuxozodrru8.pdf
    • https://sojenumodab.weebly.com/uploads/1/3/5/2/135296615/tapomedutu.pdf
    • http://kihepc.xyz/flashback_a_brief_history_of_film7lu9t.pdf
    • http://wugigazugijub.22web.org/bidimi.pdf
    • http://natfreshik.fun/litalibewipogafuduvexiqiwx1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kijelopazekune/53479014736.pdf
    • http://warurodezum.epizy.com/nukuvokidelot.pdf
    • http://xawosote.epizy.com/zonaterozodenuregoxe.pdf
    • http://mepojijolotezud.rf.gd/64693938599.pdf
    • http://pejaxuvotovu.rf.gd/pokemon_heart_gold_unown_report.pdf
    • https://s3.amazonaws.com/mefonevimimix/mumavuvexelodebutuk.pdf
    • http://muxoridevifi.epizy.com/civic_2012_manual_olx.pdf
    • https://s3.amazonaws.com/fuwenoxuzasila/21_irrefutable_laws_of_leadership_worksheet.pdf
    • https://s3.amazonaws.com/begijufadi/offline_castle_building_games_for_android.pdf
    • https://s3.amazonaws.com/jemazejodep/passport_renewal_form_canada_ontario.pdf
    • https://s3.amazonaws.com/lurutopobi/83660805462.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_off0000e5e8.bin
f3b982d64161922217aaf71220cd5b0ab9311d1434f4dfd013f07c94da02b867		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E8 5288 bytes
font_01_sfnt_off0000f813.bin
ac7ec706758da18e599d89ff0b79019c2c25204523920216613ee4827b18ec62		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF813 11756 bytes

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