Malicious PDF — malware analysis report

Static analysis result for SHA-256 f467e869c370a117…

MALICIOUS

PDF

87.3 KB Created: 2021-08-14 04:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2f98eff27c3fef24477134f440bfedf3 SHA-1: c7c0e8df78123d9f22e9372b292fde87754cf1ae SHA-256: f467e869c370a117be862c47b9aff30ffa1c923fadbc6c5f912dc9dca99a2975
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting it's part of a phishing or malware distribution campaign. The presence of multiple PDF files in the URLs further supports this, as they likely contain further malicious content or lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://bruceleevideos.org/images/file/likirinawadolu.pdf In PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/3jl3jccrus6n4ruhe0bogpeh0d/11209943503.pdfIn PDF document text
    • https://birotex.rs/images/files/76372311332.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/dovesoderijini.pdfIn PDF document text
    • http://northwestpixie-bobs.com/clients/e/e1/e1941a3904c49320334fd90e0ed9e852/File/demowebanujitikabu.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/vpqijuhv3lod61nfbjr0ul1i31/garopomigabuvoroti.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/4bae40e622b576e06df4eefc6afbe7a5/16173265217.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/f37e9048b165e06a456bec1fb27628ca/53369885211.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/61899c41d00e033285b1fc66a6e40428/71685684004.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/a2afgabiqh8rcu6cpnas15plt9/bopunajikabawezipaguxefud.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3aff719c8---zaruxefoxozivuf.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e682472620---zogumuwez.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/f999b123050744055cc7d288f5b16a05/18166602867.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c21b3ada8---sederokifufa.pdfIn PDF document text
    • https://digireg.li/upload/27000592084.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a013fccfbc1---88651145082.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image//files/zugoxokefivuputunonose.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc27f079cb---4426072610.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/63605716547.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/neliluzoxuson.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/49670520977.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/rujaropebaj.pdfIn PDF document text
    • http://rld-carbon.ru/file/liditozuxavisitiwo.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/wuxerodutadepowevadav.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1609d38cfd221c---bijakolixopadaxori.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/56b45d1a51b33079ae0b1cc6075a6eec/4473861525.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+use+the+dash+deluxe+egg+cookerPDF 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_off0000f199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF199 17320 bytes
SHA-256: cff94486616542fc3dffb04f3c5bd2629ad13eee56490401c629a6988a11fadc
font_01_sfnt_off00011ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE3 10824 bytes
SHA-256: 7c7bd206f613b8c33bf9be176247a6cdc0f89168583bae149f1d9ffe6538d93c
font_02_sfnt_off000137e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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