Malicious PDF — malware analysis report

Static analysis result for SHA-256 389e2d8a4d3674cd…

MALICIOUS

PDF

86.1 KB Created: 2021-08-22 06:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dd7a97be736691738d62f97753a62d5a SHA-1: 7b87a4588ddd7dae922003c4fc161ed652cfc174 SHA-256: 389e2d8a4d3674cd28c1ab94ef2bfea70977ce26d040b611ee81b9cd3f9a1da8
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The document body is heavily obfuscated and unreadable, suggesting it is not intended for direct user interaction but rather as a vehicle for these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/lidonazapiduvisilobupebud.pdf In PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa58333377---864174726.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609da27739fbf---relosa.pdfIn PDF document text
    • http://zivotzaokny.eu/res/file/62461406373.pdfIn PDF document text
    • http://drironcat.com/images/file/3587169731.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/7dli6gic46ijd1a5aq7ovjqlgp/novaxugapavoxefanuju.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/89e5fddb4a878dd51e3162e10c243525/7648792001.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608185ba030f9---femise.pdfIn PDF document text
    • http://fluellentrees.com/clients/58222/File/vaxelatebizox.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867499b3f8e---14229867386.pdfIn PDF document text
    • https://birotex.rs/images/files/xukewiwofufetagunu.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b06ccc3491---kagevijowodu.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846ae583e3d---17756288774.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fab3d0fef6827fa2c0da530136d440eb/bisutokemakiwixod.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/bu500jkbdfaih2j6kg0oqioqqs/koxotazubewafijo.pdfIn PDF document text
    • https://kildevangen.dk/files/37741753269.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084ed6c1f0d2---saxowabimemaxowibam.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/9fd40cc47d5b53bf012d6174506fe161/44798027928.pdfIn PDF document text
    • http://lucchetta.net/userfiles/files/busasu.pdfIn PDF document text
    • http://saxonsaxtonfamilyreunion.com/clients/f/f6/f6d0431f970e0833b0867c311dafb132/File/vinurubutabimiberulatizi.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/bigiresaxalezaj.pdfIn PDF document text
    • http://multifamilyfoundation.org/clients/3/38/38c33163524538bb895552046de0b362/File/fisiwasedek.pdfIn PDF document text
    • https://inncredel.com/uploads/nepotupobetaxo.pdfIn PDF document text
    • https://ladachess.ru/userfiles/file/begudapejasujoxepijudi.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/loxofebo.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b97ab4abd---pesuka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+assemble+ikea+malm+bed+with+drawersPDF 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_off0000e97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97F 10716 bytes
SHA-256: 0e28a7e8a280e0b427cc07ac200a18e49b1bd080feb8df0c42488939c694af47
font_01_sfnt_off00010218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10218 17244 bytes
SHA-256: 62e8be7868b5e35c6929537d011587cf69b14e65333e1c99308997dcf92a10c9
font_02_sfnt_off00012f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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