Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e49ef31d759e19…

MALICIOUS

PDF

81.0 KB Created: 2021-09-20 14:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: de4ec91f6f95fd34ff7edb474a7d9c27 SHA-1: fd82dd7a974ae1878abe3acbdbf646a274c5e4c5 SHA-256: f9e49ef31d759e194e4ae17cdf931259f01b5cd1b0beb7f5459b02d449964526
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is identified as a link farm, with several URLs pointing to compromised WordPress upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware through the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://crewmak.ru/uplcv?utm_term=god+of+war+faces+of+magic PDF link annotation
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613caddf38d88---dukebedelowez.pdfIn PDF document text
    • http://inbond-cn.com/userfiles/file/26584880004.pdfIn PDF document text
    • https://cakkue.com/contents/files/42197992471.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/15696540144.pdfIn PDF document text
    • http://gutachterbewertung.de/userfiles/file/mogeweduzufijiv.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/silajilazagaramuref.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/8219220802.pdfIn PDF document text
    • http://stroi-sistema.ru/img/bidilesikitubisefat.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/sosedaxi.pdfIn PDF document text
    • http://dierenwinkelindex.nl/images/uploads/24578741010.pdfIn PDF document text
    • http://pscemetery.com/userfiles/file/lobumomapoboluzu.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b9295dbeb---59608287549.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/fuvija.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/mesukibamigazilomar.pdfIn PDF document text
    • http://regmac.net/userfiles/files/13208932391.pdfIn PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/tuzadipabunuzatefo.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/lokeduf.pdfIn PDF document text
    • http://getem.eu/files/file/nutomor.pdfIn PDF document text
    • http://321eastern-thailand.com/userfiles/files/2302706265.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/d6c5494fab71fbfa87cbf85e2b27a704/tedenevune.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/49273882674.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/56914870657.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/d57c8a945bdadccf2e8c9c3a489833a1/debelixeluzegegobulizaz.pdfIn PDF document text
    • https://suprastoc.ro/userfiles/file/31951231359.pdfIn PDF document text
    • http://stickers-moins-cher.com/userfiles/stickers-moins-cher.com/file/kapefonuz.pdfIn PDF document text
    • 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_off0000dae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE2 16672 bytes
SHA-256: 1badf2beab8ca4a4ee36c58da925aa9a2477c7c8e569649d09638b9284598594
font_01_sfnt_off000105d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE9 10696 bytes
SHA-256: 85596a9439ea0d99385e4721810f777c4f81ed0f1add62722c9133edf8fc6813

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