Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2eb66a25960c0e3…

MALICIOUS

PDF

82.1 KB Created: 2021-09-11 23:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e0b339ffb51e11a57a8d7f04d5f4c253 SHA-1: 5d9166b862584f6faab37087d02cc0ee95bf176e SHA-256: b2eb66a25960c0e306ca2b107df986ffc15bbd554a892e1e11bd71f87c76b970
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable hosting or redirectors, indicating a link farm designed to obscure the final malicious destination. The presence of external URIs and the overall structure suggest an attempt to direct users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://crewmak.ru/uplcv?utm_term=shadow+fight+2+data
    • http://galaxyjewel.cn/uploadfile/files/32856743110.pdf
    • https://zagi.hr/files/75591896658.pdf
    • http://winkeleninzundert.nl/uploadimages/files/tenigu.pdf
    • http://kulturazebrak.cz/userfiles/74602911417.pdf
    • https://reclamesticker.nl/images/uploads/file/
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/70069248031.pdf
    • https://rimsball.com/ckfinder/userfiles/files/60494000164.pdf
    • https://littleedupark.com/ckfinder/userfiles/files/68920903408.pdf
    • http://miyagi.chi-kara.net/Upload/files/lagezujefizunibakujegew.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16131addd4fc1e---77803126678.pdf
    • https://www.hsbofmn.com/ckfinder/userfiles/files/dopoparidosekujudam.pdf
    • http://orthodoxvaidikasanghom.org/userfiles/file/kilajulivazasazudi.pdf
    • http://campbellelectronics.com/uploads/mewabokazobukatotutop.pdf
    • http://lynxauto.ru/userfiles/file/79281507461.pdf
    • http://altelaw.com/uploads/image/file/44068316736.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139bd4f7ee53---16104308658.pdf
    • https://grup-insaat.com/userfiles/file/4626181494.pdf
    • http://daehnfeldt.com/userfiles/file/77304833382.pdf
    • https://thuaphatlaihoanghuy.com/uploads/files/33556299749.pdf
    • http://ppogrimall.com/upload/editor_image/file/rasefusefet.pdf
    • https://mkserwis.pl/userfiles/file/3854571938.pdf
    • http://dieta-plus.pl/userfiles/file/detazulebibu.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8e9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E9 16792 bytes
font_01_sfnt_off0000f100.bin
5cd88d3e161d305cc883450e2dd2bbb993a0d0976d32eae3ac18612735ecf3cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF100 10364 bytes
font_02_sfnt_off00010877.bin
2e40f1de9eae1915b681bc6ead5923545f02660716a6a5b84ba87f23135b7aac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10877 19552 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.