Malicious PDF — malware analysis report

Static analysis result for SHA-256 08dab69497c24379…

MALICIOUS

PDF

86.8 KB Created: 2021-09-04 06:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5de337f0e704f2457c1f1b9e17471c2e SHA-1: 84ea8bbf0cb0e4ba1f97952f406378ca9571bb4b SHA-256: 08dab69497c243790b512e96e4d59334b4cc5684d2dd566152c3736a4b4fb848
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to distribute phishing content or malware. The document body is heavily obfuscated, but the presence of external URIs and link farm indicators strongly suggests a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://wastran.ru/uplcv?utm_term=o+que+%C3%A9+mitose+e+meiose+pdf PDF link annotation
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a42bf3b18---sakovubax.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/37sooe9rq5ei44j11mva28ie91/61947525050.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160981fe118f48---26255820921.pdfIn PDF document text
    • http://temple.mo/userfiles/file/danegosifowe.pdfIn PDF document text
    • http://naturallymine-chicago.com/clients/867610/File/79453202695.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/50387714097.pdfIn PDF document text
    • https://qpshouse.com/upload/image/file/84253789428.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/pesubonubiwaba.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/83604082471.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/xekokofifunem.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/46af591e7373cfa206f9aace0541829b/jelojine.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/757763ca5253bb3892bd24fb3a53cb07/rolesipunajezixipu.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926b7c25ed9---kelomapulonifuluso.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/2b0e680e3b6d67d2e7563fdd7ee12236/50477987707.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082996470752---neden.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/95732648216.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/78d71d8e7db2c299a1f4eb03c4eff0f2/vojinogegoles.pdfIn PDF document text
    • https://tutorsbureau.net/userfiles/file/61440291263.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/pawodedexanigovavedupam.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/b7804d70bbbb943811066f405065ad2c/novigupufat.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/rowidapo.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/8fe459080a2440e4d0b499585bd39699/29056802253.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_off0000e7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C8 20892 bytes
SHA-256: 3eec094430b14e6ff752334c481ef37cd242174efa423f3f9db3311eedac0f6e
font_01_sfnt_off00011b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7A 10672 bytes
SHA-256: 3d58ab50e5f43c64792e2471ecee69ae0faea43d0f54f1acd7c0510ceb75879f
font_02_sfnt_off00013374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13374 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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