Malicious PDF — malware analysis report

Static analysis result for SHA-256 91a5fb0fad3a65c9…

MALICIOUS

PDF

104.1 KB Created: 2021-03-01 03:26:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 1cb6176c452903f0fa9153516886fff5 SHA-1: 0a5d3089b16967831673f73e5ec917eb0d84ada5 SHA-256: 91a5fb0fad3a65c918675def8c8776da1274d4734d74c553c6966237545486a7
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The presence of an external URI suggests an attempt to redirect the user to a potentially harmful website, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/123?utm_term=is+procreate+different+on+ipad+pro PDF link annotation
    • http://kengoru.space/29800174470z3h40.pdfIn PDF document text
    • http://domastmsk.space/943032615569jnw8.pdfIn PDF document text
    • http://jakebaxujimug.22web.org/what_does_each_egyptian_symbols_mean.pdfIn PDF document text
    • http://tublitalia.fun/84364360654042vi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fonajuwowo.epizy.com/41711859727.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/24565799452.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/81764298142.pdfIn PDF document text
    • http://bifakafuwal.rf.gd/menunemevonisiwovuzirolu.pdfIn PDF document text
    • http://xotepugiz.rf.gd/dewalt_xr_circular_saw_manual.pdfIn PDF document text
    • http://tuzegonu.rf.gd/verb_tenses_chart_spanish.pdfIn PDF document text
    • http://koxogulu.rf.gd/movafi.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/halloween_graveyard_sheet_cake.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/branding_guidelines.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B20 5052 bytes
SHA-256: 1f004c486425975b2d591046d4dcb14b7a9a0a507fb5278990952b640a1ae7ae
font_01_sfnt_off00016c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C5E 11524 bytes
SHA-256: 1f2b92ca9bb5f0f33dc3335118e485307278fa2c49867eaf12c8e634f6363635

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