Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f04181c240eb133…

MALICIOUS

PDF

85.0 KB Created: 2021-08-14 13:34:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8944e7b44dec38a0f34e5d56196e902c SHA-1: 954216ffce1e96d6d5b8cf5a33a9aa5462bf0134 SHA-256: 2f04181c240eb1333be34e393e8a9b86c29c9db393e4bb5abd953a89d64dd434
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of external URIs and link farms indicates a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=princess+leia+theme+piano+pdf PDF link annotation
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/80b4038b8ea2224318d8a83a63377171/bewuwofusakekepirigus.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/16hjngmcf0osec1ru63379mou1/66108079067.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f0c133bef---61223579213.pdfIn PDF document text
    • http://reclamesticker.nl/images/uploads/file/xutugibulajole.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b417f35722---91578520880.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/d51eb7e479a43824fbfe2ecc87ae0ee6/3975622669.pdfIn PDF document text
    • http://pcserviszlin.cz/ckfinder/userfiles/files/9413222367.pdfIn PDF document text
    • http://harrisonfamilyreunion.org/clients/868801/File/vaxetimudedofuvirirepobod.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/63780974224.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607108c04286c---23765679733.pdfIn PDF document text
    • http://sanxuatbanthinghiem.org/app/webroot/uploads/files/79395113023.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/nb77nb8ik90p7c7fmvg6aro5bi/fovorirunazakojotubeled.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709b3f5de96---69128300895.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/mefimawadaziripeguvujit.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/8233851109.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021052515253273499.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/i5c2hgb0cpp9nh3cp0j4dq9i67/zagalumoxik.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/11238974898.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/novapifovirozidizobujuvun.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/e8u0pnps6gaig4oovh76vpu1a3/nizijofefoleso.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/0746fa78ebe18a182c94e32e6016902b/74225453071.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/xosominotalisox.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098592a13722---mojobixuxi.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_off0000e579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE579 17664 bytes
SHA-256: cd71c49a4e308756032649ac0562a4d4308c589f6237f97ef145c40ef7f5b200
font_01_sfnt_off00011449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11449 10888 bytes
SHA-256: 3d159ea07db84daba8909847361921f391d0249b9440b459fd31ea981af4212f
font_02_sfnt_off00012d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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