Malicious PDF — malware analysis report

Static analysis result for SHA-256 67defe468008593a…

MALICIOUS

PDF

84.2 KB Created: 2021-06-30 16:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a56cf27b3c7845f3be0c7703d3c99c07 SHA-1: 729b5150a97464bcb36d9dff482c929c53a4f1d2 SHA-256: 67defe468008593a0ca4042bbcc41c469aadc449c9a14efd777e91f10b2e2341
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It contains numerous external URIs and link farms hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the link farms indicate an intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://infrive.ru/uplcv?utm_term=approximation+and+estimation+worksheet
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/e42d2c75af0150da5e5337f74879378a/14057035682.pdf
    • http://effektfilm.de/files/file/4011028230.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/14c933fc1aa834ef2a6bcc7dc67f70a6/vipuvetijagovorikune.pdf
    • http://cck-brno.cz/ckfinder/userfiles/files/tofufulolojixuredosuzi.pdf
    • https://sport-jicin.cz/dokumenty/71816785161.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160900dc4a99f8---12361800503.pdf
    • http://aps-mes.com/files/file/rufixifevumel.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160719842e447e---79126139899.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/dhmtmup6demhd5s0jg55tipqno/vodukivoxidojewu.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607802ab466e4---fitakimivetigitiwe.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/f720933be1ad987fdd8bc204aee84cdb/64379720608.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/egffj2h5ii6bvprl5skbod2to5/tajidufuxolikowula.pdf
    • http://renovator.cz/files/file/kutakatoxofole.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/5f955b4d9a62613b10fd2a01c67de339/62025666205.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/pnqegsfeqdrvusc31c8js73fc2/didibuduzorogamafo.pdf
    • https://zohopinler.com/calisma2/files/uploads/palokirusurufaxog.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073f798b6998---23144291557.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a339333d3c---52496668880.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae87846c1fc---wumebokodefifekukedipob.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907e54378c2---folagok.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f377c09470---gafuvewodis.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/5142743e8486ae1d05ca450653d925e0/nuditetefofuranapemazu.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606fec4997d74---37157126056.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_off0000e276.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE276 16792 bytes
font_01_sfnt_off0000fa8d.bin
750cd28039ab51fd12b086911a1409715bd64d156126bb9c78f2aeafbabdb7a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8D 10872 bytes
font_02_sfnt_off00011398.bin
934365fdca9837f20f2edc3cbf0bf421549ffa584764cbc04001d0edb33d808f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11398 17540 bytes

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