Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfdcce8523e50a31…

MALICIOUS

PDF

83.2 KB Created: 2021-03-23 11:07:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 777491cec8f05e6c468ac4de99ee0f9e SHA-1: 123449e60a194a564aa283774275bdeb06852113 SHA-256: dfdcce8523e50a31ce6687ac2ab2336e7aa494ff63e178fc06bccd87562005cd
104 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs and urgency lures. The embedded URL 'https://ponafet.ru/strik?utm_term=optimate+4+dual+program+tm-351+usa' is a strong indicator of a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=optimate+4+dual+program+tm-351+usa
    • https://vumeganutubaxo.weebly.com/uploads/1/3/1/4/131406578/bc58ee20b70.pdf
    • http://xodaxedepapopox.mygamesonline.org/the_devotion_of_suspect_x_reddit.pdf
    • http://wuromigujab.iblogger.org/part_of_speech_preposition.pdf
    • http://vutezokikunix.iblogger.org/70499706413.pdf
    • http://jibinomazovujug.22web.org/types_of_houses_worksheet_grade_3.pdf
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/8d1f808c9574cc.pdf
    • https://dugitesabisaxo.weebly.com/uploads/1/3/4/3/134392589/momafi-dogexitimuvif.pdf
    • http://zonitupupafof.sportsontheweb.net/gejalu.pdf
    • https://didunoduwogu.weebly.com/uploads/1/3/2/6/132682107/depife-rafidixubawiw.pdf
    • https://ligefunodimab.weebly.com/uploads/1/3/1/3/131398292/c7f5e225.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vekodupiwarobi/kudobadinirupipa.pdf
    • http://jabejanaboz.atwebpages.com/what_is_a_good_word_that_starts_with_e.pdf
    • http://gikutixutawax.epizy.com/27626674510.pdf
    • http://feworoborisadej.epizy.com/holistik_tp.pdf
    • http://zepotusetazokor.rf.gd/how_to_start_treadmill_without_ifit.pdf
    • http://folusezik.epizy.com/aeronautical_engineering_books_free_download.pdf
    • http://bibesatu.epizy.com/63345030740.pdf
    • http://kudurefusi.epizy.com/51944217776.pdf
    • http://galexuduxegi.epizy.com/bumavog.pdf
    • https://s3.amazonaws.com/setaxilitozuko/81873318980.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e35d.bin
7fe02108c6cdf770ab26abf59a81856670164cc672b2a6ae12be74d4da927c1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE35D 5764 bytes
font_01_sfnt_off0000f6f9.bin
dee5d0306e2cf25a4fc9c6929ded6c028daa1f777b2987fffd45d9d41ed706aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F9 12004 bytes
font_02_sfnt_off00011ffd.bin
31e400ed11449f269077d973423b664d24d859fca531f3473e70b9f7a69d4efd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFD 18480 bytes

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