Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc451ec503723395…

MALICIOUS

PDF

93.2 KB Created: 2021-07-03 07:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 55a9cf4cb3667e80b9992ccfe2d47abf SHA-1: 891f2c653d5b8e099aeae11f523d6fb4e7309cfb SHA-256: bc451ec503723395591842cf09a875c6647b39b9113085a8d3c2cc743236272f
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://nnt52.ru/userfiles/file/borab.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ded7013daa---73929943723.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd9918b657---zujuzogejezoda.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7aa8714f8---luxukoxasipekinu.pdf
    • http://csc010.com/userfiles/file/20210701204931_a0hmeb.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/866f53ac4ab514bf1b94a12096f2b7e0/bulozibokotijamodogop.pdf
    • http://rld-carbon.ru/file/vadefurifasudanofoxo.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa03685753---5432173824.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/3edcdd1d31819372defebccdafb97804/80140542384.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/efilrp70j9fn2ut2bgf0f1lugq/87349214862.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cadb00208cd---50544285068.pdf
    • http://akinmedikal.com/uploads/file/63003304588.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761a8506a13---96084349300.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608513d7c57de---xoguxaruveresesefewokigo.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/587e2d4f0f8711668e3d2d3ab3770fe2/65592226299.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/234436396fc57d57f567a22b1d007232/66735210427.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9336135339---95432290818.pdf
    • http://yuha.be/_files/file/bosakezaretapu.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16072f1fbd049a---nifolomebisajugimaw.pdf
    • http://seamacros.com/upload/file/20280079675.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb7440fda8---77496236622.pdf
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/makuturukozenisu.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/f0a8c590dc6464ca647593399c51eb73/pewogemutubalidag.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=live+catholic+mass+for+today
    • 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_off0001063c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1063C 16792 bytes
font_01_sfnt_off00011e53.bin
445cd89ee1b78afff24902e965ed373c95fdf552a93a7291e7be03fc09b484c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E53 10776 bytes
font_02_sfnt_off0001372e.bin
caa9e49672223247fd760af764207c641524d9b12383462cf4636449b3d94eea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1372E 18608 bytes

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