Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba29ea2e74c7438…

MALICIOUS

PDF

76.8 KB Created: 2021-09-07 19:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8dffea1b82f1c63b5e292c70c29fa726 SHA-1: 38f0d89605991ca7a8486d5e95b8daf32c130d0d SHA-256: cba29ea2e74c743874a95c47d7bfad2e5b28bb0dc026d98e34e380c7ddfcc059
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://norservis.cz/files/files/busewedaseguguni.pdf In PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/7642b009cb2642790a1c9662a3c8f498/kovaxawokifege.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/82518903349.pdfIn PDF document text
    • https://giridhareye.org/ckfinder/userfiles/files/26963259037.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/nivibirufazes.pdfIn PDF document text
    • https://vantainoidia.vn/ci/userfiles/files/nakowaxotawep.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610121c9f1757---sowamogidawusonixesabot.pdfIn PDF document text
    • http://hoacanh.net/luutru/files/96411567862.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608473b1622a6---55779586604.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/74908238487.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/60168161808.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d57ac0344a---65957296091.pdfIn PDF document text
    • http://antitumor.org/filespath/files/20210831030744.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/a83dc61a54b1a92fff5027010bf404b3/kizetetop.pdfIn PDF document text
    • https://raljob.com/userfiles/file/38069626064.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/83223333419.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c35f8bf0c1c---zumugataroloxisewezoli.pdfIn PDF document text
    • http://lakes77.com/clients/47041/File/bagevek.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/topilevojuzamitabuzuz.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/togus.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/kk0sqft323sjoqg4fvvsaq2pkh/93682255344.pdfIn PDF document text
    • https://etimes.mn/uploads/files/fiwewoligokokir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=craftsman+riding+mower+repair+manualPDF 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_off0000cad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E7 11056 bytes
SHA-256: 586ceee16301575f78983107edb6a42dda26665f95506f27ffb0495fe5ea8fbe
font_02_sfnt_off0000fc79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC79 16224 bytes
SHA-256: b87898770fd7a06e47d6eaa00fecc27def9c13961614f7fb668d295ddbf90ab9

Open this report in the interactive analyzer, or submit your own file for analysis.