Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4770c13e10356f…

MALICIOUS

PDF

109.6 KB Created: 2021-02-04 08:37:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 51abffcf0993c8fecfa7fb2a660b20f4 SHA-1: 9bfeff166d425e9ee90d97806838b99022226850 SHA-256: cc4770c13e10356f5835c4e2c033152e1c78e140b23ec163b27e64275724209d
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URLs and the document body, which mentions 'free elementor block templates', suggest a lure to phishing or malware distribution sites. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware delivery mechanism, likely initiated via spearphishing.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/aws?utm_term=free+elementor+block+templates PDF link annotation
    • http://vsyahakasia.info/moveza8bjl8.pdfIn PDF document text
    • http://prodson.fun/pepsi_mission_statement_best_coke3e4gg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471234/normal_5ffe27ea6fb67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369518/normal_5ff5b0f0aa2cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456379/normal_5fdbde236552e.pdfIn PDF document text
    • http://tefosewun.22web.org/manualidades_navideos_para_nios_de_preescolar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483867/normal_5ffbb678050ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404103/normal_600d3ebb7b56d.pdfIn PDF document text
    • http://raketun.22web.org/mental_health_assessment_form_in_spanish.pdfIn PDF document text
    • http://vizit.store/zaboboxibudaxemag8xq69.pdfIn PDF document text
    • http://masterpowerpoint.com/finding_square_roots_worksheet7ws6p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/aster_aweke_new_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/91771079237.pdfIn PDF document text
    • http://wawutanow.epizy.com/16654847236.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A2D 5236 bytes
SHA-256: 666462cb20cbe8f5369c85a43ea27d8c22fdfd1b8a78c2993da8e2f7302adfd3
font_01_sfnt_off00016be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BE8 11412 bytes
SHA-256: a5865fcf30220e9b1ada897ef4341377aff53e71a6f0c5f01ffce2f5a9a07bbd
font_02_sfnt_off000192b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192B0 16376 bytes
SHA-256: 684a3c196e802b4dc45ee85e0d12f41c83d6b6c6a55a83cec5fb8e332ee9aa36

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