Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f20fdb038abb89…

MALICIOUS

PDF

88.9 KB Created: 2021-08-11 14:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 142e28f690286505e80de189beabde69 SHA-1: a95fd6cbaa5c280616878cd32079d933f9e457d9 SHA-256: 06f20fdb038abb890a9f47c4ac95c49042dabcdca3889706d1151addfa4cf371
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are consistent with a lure document designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://erdbau-rauch.at/82198406511.pdf In PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/pv0mq489e03dk5b5qua0pouhfu/bizovudadofoletuwose.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/47746922232.pdfIn PDF document text
    • https://progin.ch/ckfinder/userfiles/files/tufawewazelal.pdfIn PDF document text
    • https://coil.hk/upload/files/51059090894.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/xelemalu.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/kefotufogizebewuvodu.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54420781320.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/dozalilonosife.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e399184a347---rosimofexepajupirajunela.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/cc502c4b052de0a183b11bcac054abc8/78988897031.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb3b36bd6d---nofejepexesefoxiku.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/43755049448.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/wuvarux.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/wunugurodafigi.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/42425959174.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/69200502388.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16075b02d8d182---mepunifawuwovabojokador.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/95785575925.pdfIn PDF document text
    • https://forthepeoplegov.com/userfiles/file/9070244822.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/c65a865f65fe1d1afab2a3bf68c6bb9e/98904838947.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/mivibiwokufozil.pdfIn PDF document text
    • http://altinay-law.com/images/file/lugonusifejukedepilat.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/lizujukibaxe.pdfIn PDF document text
    • https://lasanisports.com/files/19823519562.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+determine+r+and+s+configuration+in+fischer+projectionPDF 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_off0000f2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DE 11328 bytes
SHA-256: 86ff2ca7e5cab7b38dcdb40326a7fc56ce9fca731ebdcc8e8e80e93ee06d6db1
font_01_sfnt_off00010d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001252c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252C 18040 bytes
SHA-256: c85787acdaaa414c99e680d9d8ba419fe82050f03543685650d34d0771eba24d