Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad592f7ee5b2459…

MALICIOUS

PDF

74.6 KB Created: 2021-09-16 04:28:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 767cb409550caae34b74dabfbafc02de SHA-1: 464836600324470c6f4cb587735e250e20437c0a SHA-256: 0ad592f7ee5b245927ab50b765e1b729f02c16013c34345f379e4b841bce5a75
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are embedded within a link farm structure, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=abbyy+lingvo+android+%D1%81%D0%BB%D0%BE%D0%B2%D0%B0%D1%80%D0%B8+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE PDF link annotation
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/zirelel.pdfIn PDF document text
    • https://deltaguvenlik.net/userfiles/file/barinuvixosepemo.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/denedajula.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vobilapilijewozetin.pdfIn PDF document text
    • http://nikolabartakova.cz/files/file/32334979432.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/42642303980.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/80267891846.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/tebimoxufemusamugova.pdfIn PDF document text
    • http://pk-rowery.pl/user_pict/file/vemaxekepepekuletubib.pdfIn PDF document text
    • http://cermak-expo.cz/data/files/file/ruvasedopipa.pdfIn PDF document text
    • http://themetamorphoseprogram.com/userfiles/file/xebegujijevetiledi.pdfIn PDF document text
    • http://tageedesign.com/ssmpt/documents/file/lijulipebu.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/14156220348.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/jijijavegexu.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/zutolesazijowuzawakofa.pdfIn PDF document text
    • https://natanashoes.com/kingkong/userfiles/files/kuwanitub.pdfIn PDF document text
    • https://letstravelforacause.com/miet/assets/files/retopixike.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/mofufavipidewepu.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/fudabigubinaruzulek.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16131764b27533---gesijuxekejig.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/25481068131.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/79118286559.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/161419cfe05215---xiwexogexo.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/17222792118.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/40704631002.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/80510119458.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://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_off0000b5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C8 12044 bytes
SHA-256: 754c210842b348fcf5c19220a4283a9cbb94ab073d736e35d759e88af299c7b8
font_01_sfnt_off0000d165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD165 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE977 19320 bytes
SHA-256: 9c18216388d6c52837eeaa4766481a499620087905600c46c71f463f85d8e63a