Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75eb9d6ee6d869f…

MALICIOUS

PDF

88.2 KB Created: 2021-06-26 12:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce111cc5d96c8ff0c4c9d618263692e9 SHA-1: a1d411ecc19d6981bcbe89690f012dada1460784 SHA-256: e75eb9d6ee6d869f36b987faadab7c49cc116aed30e6c631006b7c51cb7c5a43
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead users away from the document to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=is+pe+required+to+graduate+high+school
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/gti0hpsr4aov3t695ve5hfddrb/zitaragazijegexitul.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/ab82781afc3a816d487262a887d122ab/43827972900.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160ad065d7a47f---87375915832.pdf
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/16c3e715b23981edb13182d7b8260e39/zekijafomiwir.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/4c6bb8a51d0b2e3e6c6af87868596482/6647024014.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/0a8cffc59308896024f7825026ea2108/jojaletokubojameketu.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/a1524d5bb818663ae1c7bff31d0ecdc1/sokino.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/tua0lgam23kgh261vb0ktv6980/2632561632.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/57664e78c65f3bc305042a008a92f25b/ruxewasiwojamazonaso.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087f327687fb---wurajavedofolemes.pdf
    • http://aeronautike.com/userfiles/file/47885719908.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/14dvhghh690362iah5o9v3tg3o/94584318461.pdf
    • http://daehwa.info/uploaded/file/9017449346.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec06ed6499---dawunivoronaxupob.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b5eaae1a790---46495840654.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b9fb272a6b3---47219226406.pdf
    • https://charterfori.ir/basefile/charterforiir/files/lirinewixenu.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607669eb66449---81161775927.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160937f843b940---79688758189.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bab36cd7aac---lejozezalawela.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/1aaichds9jnr10sjsn4i9kk1e1/79599059487.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073be6082bf1---raredomisumid.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/ce33ca140415cd2eba68373b61e1aa4d/mowowinalataw.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_off0000f44a.bin
48c231a368f3c09523c844ff07cc0203c3ab2144e498caf462490c761bcbdc5a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF44A 10888 bytes
font_01_sfnt_off00010d14.bin
cea8015e0f7d4150bbffcf75e5f2a1b6b4467f21949e15158cae7c91b6fd6f24
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D14 17304 bytes
font_02_sfnt_off0001398a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1398A 16792 bytes