Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c09f1c91f528726…

MALICIOUS

PDF

73.2 KB Created: 2021-09-16 14:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 63167662690ca0db84963367b2541312 SHA-1: c1ee84636f143b8f755c0a9b191894777b18e01c SHA-256: 0c09f1c91f528726a3146af63559c1615347a82a75bc8f319149eeee4fd3b102
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, suggesting malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to prompt the user to install something, a common lure for malware or phishing. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://abwlargo.com/uploads/files/95494758074.pdf In PDF document text
    • http://bukharageorgia.com/sites/default/files/file/motowamupokoveliz.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141cd0e9bb9a---65364344049.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/53683288809.pdfPDF link annotation
    • http://vinhomeshaiphong.net/app/webroot/img/files/laxeve.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/98663430139.pdfIn PDF document text
    • https://thebottombillion.org/business_school/uploads/file/fagibabapakinuboxusiwudov.pdfIn PDF document text
    • http://etkenkalip.com/files/16735538499.pdfIn PDF document text
    • https://oldd.adventurenetbg.com/userfiles/file/81217409522.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/46037264457.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/99526005001.pdfIn PDF document text
    • http://www.egymast-segito.hu/uploaded/fck/file/88744463291.pdfIn PDF document text
    • https://heart-calligraphy.com/uploads/files/202109010825044257.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614128029c0a7---tepexibudeboxiduxakorude.pdfIn PDF document text
    • https://impulsa.mantareys.net/uploads/plantillas/files/molilujokized.pdfIn PDF document text
    • http://tivati.com/uploads/userfiles/file/vapaga.pdfIn PDF document text
    • https://showdetango.com/bafa/userfiles/file/41313516359.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/25249452527.pdfIn PDF document text
    • http://esipro.be/userfiles/file/nugonamasa.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/sikewomawunodov.pdfIn PDF document text
    • http://norilsk.torbay.ru/images/uploads/file/13421238238.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/23552365769.pdfIn PDF document text
    • http://turksebruiloften.nl/userfiles/file/12131848020.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/fisavixifepozitik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=download+itunes+on+chrome+osPDF link annotation
    • 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://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_off0000bed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBED6 10824 bytes
SHA-256: ab388a18d128cb40fb4d23e26962e17f9783ecb00843dae5da69eb847c0a9925
font_01_sfnt_off0000d7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000efc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC0 15560 bytes
SHA-256: 5c55c9c69481466eada9d0755163c49ee5c8b95fa0ad3fa9c701905c58a31157

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