Malicious PDF — malware analysis report

Static analysis result for SHA-256 06544c2e091e452a…

MALICIOUS

PDF

89.2 KB Created: 2021-06-27 00:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e9db65b65a7f1c40b30772b12d2ecf7 SHA-1: d8b5a333508abae6b7ff21922defd9504fb4f285 SHA-256: 06544c2e091e452a72fdeba12772c831acbc672b3dd4865e3ab07d7c93d6555d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to lead users to potentially harmful websites.

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://drafthe.ru/uplcv?utm_term=best+wedding+dresses+for+maids
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/7c04ce5c742097c314198dca26629a4a/33462997867.pdf
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/3ulglb0l60qhdtquags73q0jt1/zamogepigumexutid.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873dc04dacd---juxurid.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/f07eb40d3b842bb5d4bae89f0e91bcd9/pibomivonifotamelitu.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/32d0f099be8703c1370aebc579f71a5a/rasinojiwewokugozebu.pdf
    • http://triatlonbizuterie.cz/sites/default/files/file/26814738820.pdf
    • http://imailbox.nl/images/uploadedimages/file/rejelijurigebelulub.pdf
    • https://mayurherbal.com/userfiles/file/31572462806.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/7dp099b6lri4gc2ptjqh6ba534/86732751501.pdf
    • http://adbuffalony.com/uploads/files/42889720107.pdf
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/ik6cgb1c0ocmojqenv5t06q2pl/22115821234.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/9d57608adf02aa03d608f5ecfd5db2df/2524448661.pdf
    • http://amon-syotengai.com/userfiles/file/83748374174.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba5c24c2a3---63870545179.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/a8174f63b6b84eb4889d7de20509bcf8/ganamifimazikixo.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/cfmlnq1dt1u9qsqe93750h4mv3/gafob.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160711646be616---42626610432.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755ff8eb57e---tipux.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a613596995f---68034023193.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab621c8560c---85046242609.pdf
    • http://thuexedanang247.com/uploads/image/files/vamunaluxezexuzadov.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/4cc288a7bdaa77e49535c0e04b00e071/17209564185.pdf
    • https://wineart.online/userfiles/file/24561711388.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/a6fpembu2peh92b8ck28usua32/lapaxifusilokira.pdf
    • http://podiummoda.ru/userfiles/file/53393306475.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_off0000f9a8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A8 16792 bytes
font_01_sfnt_off000111bf.bin
53823790d13a65f28b0c2182aad3d185b62d2561a0c3a38f7e09bbdc03131f48
pdf-font-stream PDF embedded font (sfnt) at offset 0x111BF 10792 bytes
font_02_sfnt_off00012a7e.bin
feff0c746b955bd76eff477aa606013f85eea8d61644f52835510d7cd03c30b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7E 17732 bytes