Malicious PDF — malware analysis report

Static analysis result for SHA-256 1947b2d59364685d…

MALICIOUS

PDF

84.6 KB Created: 2021-06-17 14:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 137a9bbccb0db5550c3a4b130c0eb0ac SHA-1: cb77845ca52d60d5f80121f6e5053b7e5828eaa0 SHA-256: 1947b2d59364685db43ceb66b785eb2591f02a7edcad52557821254cf38b94d3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a site offering a "volume booster" download, which is a common lure for distributing malware or unwanted software. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to exploit users through social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oniceh.ru/uplcv?utm_term=volume+booster+windows+10+free+download
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/9b2f28677e5b741e07fdc4515f173fc5/zemus.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbb825b664---76208091393.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f05c27bee1---pejilubetenuru.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/nl0opu62hlu7peqs2s7hn9bb57/4266254487.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/d8bf04bcca177918c60fba1c492eef74/24229468141.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3e54e8058---jokigilar.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0404a34ef9---ladowotamiraxiz.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a1ee059ab---fefitigogosabaz.pdf
    • https://gulyaskantin.hu/uploads/frontend/files/6410205968.pdf
    • http://scro.ru/pic/file/dagizovurajikabuwut.pdf
    • http://martonaroniskola.net/userfiles/file/sagosobuzuf.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/b4c2cc7a15a010b87ca0c9adb4e6dbff/zepolapirupesudekovus.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609c10dc78e55---27354538229.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b18124641e---zuranigakoxukegujebezozis.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d354c7eddd---18149023206.pdf
    • http://decaiyun.com/upload/file/2106121523393777957etpa7ctagrt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://e1pl2.nazwa.pl/busy/fotki/file/xexomumiwusupilurazar.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_off00010eee.bin
ff1cdb084974778ace3d780b67015d9e899f5c37c0690a2aca21d9285a263f2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEE 5444 bytes
font_01_sfnt_off0001216f.bin
cc7bd6b4bac741ab8ba71a3e61a432db9159ba7edbaf29a7b72f089ad45900b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1216F 10588 bytes

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