Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da4482f5e420cda…

MALICIOUS

PDF

83.3 KB Created: 2021-09-02 23:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 74d95ec4fd43b3d42417299485fb1292 SHA-1: 5a6f70b0ea50369c00424a6e945031574bdaff8f SHA-256: 2da4482f5e420cdaebdf7c2ee8189e868db898a2d9b5e318d1a13ceda520ddff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://inwebjor.ru/uplcv?utm_term=henri+cartier-bresson+the+decisive+moment+pdf
    • https://takipcisec.com/calisma2/files/uploads/wuwuferijokuf.pdf
    • http://tuderprogettazione.it/userfiles/files/losotigukelipadaruzorej.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/9d1c094bacfe351071f3729773fd8bbe/5244388650.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/95dbd7c6b4c5a4a5a4df6762d3a38e69/lukuwiko.pdf
    • http://manpukuorder.com/uploads/files/sekixofolususag.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/ade9fe515308e38685a2b436848c858d/nipere.pdf
    • http://datev.hu/ckfinder/userfiles/files/xutolewefokezugoxul.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c86ea7045e---74883849779.pdf
    • http://refinerlink.com/userfiles/file/45236095674.pdf
    • http://lmnn.ru/userfiles/file/luvumakafuvudobav.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/r156iusr9ibt5mir2tmaokm803/volele.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abcdbd4e6af---1490469324.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16095ff0b4a596---dibum.pdf
    • https://hitpoint.tw/userfiles/file/tobexubilokop.pdf
    • http://lafenicealcamo.it/userfiles/files/67981423482.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a23d9311fc6---davabixexesoramidowiravo.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/9d6dba0d7f1235e6d689902474db6575/1478753470.pdf
    • http://paletydozahrady.cz/ckfinder/userfiles/files/mutoxaresibe.pdf
    • https://petribax.nl/userfiles/file/66163325129.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/qd0k2v22guc0lemeu96uqp1nra/26825735428.pdf
    • http://twinmd.ru/userfiles/file/32292781685.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee4f28cfed0---4886770254.pdf
    • http://aldo-ins.com/userfiles/file/15317367972.pdf
    • https://kcharp.com/ckfinder/userfiles/files/jowovafuwinovunemumer.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_off0000ddc3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC3 16792 bytes
font_01_sfnt_off0000f5d5.bin
c6ad5094d02a73437ba62dc9c2ac5bd05e44751e2807f63501d66e91b6e2b1d4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D5 18548 bytes
font_02_sfnt_off0001257a.bin
2c6a7ff15dc9796e39f2cbd35e3fdb6b6e3ef57b01138fb95e2c445c4f5d25f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1257A 11072 bytes