Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4654afd4a03e19…

MALICIOUS

PDF

65.4 KB Created: 2021-09-05 22:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 653ef21d4493e29c8cfff94a0bf91ed8 SHA-1: 5448da8e59d35ee7bf4a6bd1adc66949ec164692 SHA-256: 9d4654afd4a03e19bd11b2072c5053fe7f026eeef91e12468da96c620755a99e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites and disposable hosting. The primary purpose appears to be directing users to external resources, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5448

Heuristics 5

  • 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
  • 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://crewmak.ru/uplcv?utm_term=uwc+prospectus+2020+pdf PDF link annotation
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16072334273ed9---nenesefer.pdfIn PDF document text
    • http://monktonlionsclubkidscamp.com/clients/9/99/99b8b5517e5fb663501b7ee5137ebf55/File/49449707519.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b8183a5b7---ganurifazapelevabufeju.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/wovunulad.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/caa3unqtcdv57n7hupdh1mqn70/11949089310.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/83972094613.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/fowuke.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/62262a3be51f9a21749663cc53df8034/fitatejefoxawo.pdfIn PDF document text
    • http://sutipatika.hu/userfiles/files/donirunobaman.pdfIn PDF document text
    • https://ddtoyz.com/ckfinder/userfiles/files/nigagatenofebi.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/265d1enfdvdud14e4d00pg2ctt/97715865893.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/lakmv0fb2idmgi828p5loup035/berolidivozor.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/ebbe24aab7109792d9e92d7728b69e11/86682523891.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/83460468734.pdfIn PDF document text
    • https://htapigroup3.com/contents/files/84198401080.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/63743472730.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc194ce8493---pekupulexunejesudat.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9891c89ae---44799251961.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c67efcf2c27---24869301092.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160be30ee7958f---99206083563.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/93734033171.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/4805244325.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2b1c951e54c433c2f48c2ede2964b5aa/zafuvigiri.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B5 10644 bytes
SHA-256: 22dafd8a196b2b02b8cf59d396097424689023fd7598ce89fea1abf4f81451ac

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