Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d14244ae2f1cb91…

MALICIOUS

PDF

93.3 KB Created: 2021-08-14 02:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: df3693b0d58aef7cd2f96c938a23e7e1 SHA-1: 777f9b8d9f1a1271a9993432a6cfa24368337c65 SHA-256: 6d14244ae2f1cb91000949625c8033fe2ed9c428992664a17bc694b0d8230fc2
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or using disposable hosting, indicative of a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://clairvoyantinfotech.com/demo/images/68851363090.pdf In PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/17158569022.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094109948063---kilek.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/1cbe2a097732ab2775ab96cbab36b957/21759201195.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/xunudubebad.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/46813522305.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089508c16fe9---16659075190.pdfIn PDF document text
    • http://abington1964.com/clients/865474/File/98863781820.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611378e34dc4b---18750092735.pdfIn PDF document text
    • http://apple888.vn/luutru/files/9083973732.pdfIn PDF document text
    • http://stonebreaker.at/kalowerob.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/jabuvabeperesozamulutes.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/66489886699.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kadepi.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/siq6p0edb36dnfk10abaea2hq7/64347253386.pdfIn PDF document text
    • http://hillandcunnreunion.com/clients/864369/File/36371755322.pdfIn PDF document text
    • http://michianaorchidsociety.org/clients/2/28/2832e32407c795c8d28ffe68102aa18e/File/7940809467.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/puvafo.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/jttu8a1cg9mf1cvaclimjmm6o2/92720582262.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/36437872685.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/96441754352.pdfIn PDF document text
    • https://www.db-ynox.fr/ckfinder/userfiles/files/subuzanaxizunodo.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/91203873339.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/fijuwexemeboxubotedatumu.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/mufarizoladoridojub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=what+is+the+importance+of+arrest+in+the+administration+of+criminal+justice+systemPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E4 11220 bytes
SHA-256: 2a56878a54670f130dcba7ae5a9374100c4caf2d31e8e8ad70fd4f80e4b137ec
font_01_sfnt_off00012100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12100 16392 bytes
SHA-256: 086f914b3ab0455386fe53f9a763acd3ada5dacf12ae1d04c3e0d938aa05d893
font_02_sfnt_off00014b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1