Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd84d2d95849adbf…

MALICIOUS

PDF

85.2 KB Created: 2021-06-27 02:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d53acf52afd2cb84d6095336de22ee69 SHA-1: be533d53e04920abaf785d9d73ff82d47d226ca1 SHA-256: bd84d2d95849adbff7907b9df3607ed67fb6b8278b277c2466ab7615e5a19f3b
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external URIs and link farms pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://huntic.ru/uplcv?utm_term=love+marriage+form+pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/1u36esehpsjgkjgkl68fnb956s/1515739974.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/3bc7435345abdea16b078d9aaf3bd217/pimiresa.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/ldbrm8js9ondl0i56l7kgmiovo/56290490966.pdf
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gigedok.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079bb9460a03---murudisafumaxiguda.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/1f534367dc1eb9713b8091be33aa6c08/55681660960.pdf
    • https://associazionedynamica.it/uploads/file/12550954413.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160ccb64946904---42799156918.pdf
    • http://makesomenoise.hu/upload/file/81653408731.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841661283a6---tenof.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f0297c873---geregapomezodisetib.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/74cd572370add0b14c1b2f0029b9d634/52572696974.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2dcf55555a---bofuta.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/48307f58a2f1ab8bc14fafe77587fc6b/18256580340.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/ab21ebf71c44fa959908196ea7888df1/3944252952.pdf
    • http://france-ex.com/images/blog//file/lajezawubapenarowifuze.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076494f0e127---3387393978.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a25ce87f185---puwizifowulal.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b290e42afbd---sobipefuvitadafivok.pdf
    • http://mtecommerce.it/public/news/file/27004079714.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160883b151c944---vunanobisozojijuj.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/c7661bbd1e5700b7b671f94ba63d01c7/wizubitotunapogaturoborir.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed6d.bin
343f1a73bb06671ccbc7cea160ea21dd922c0d8315f591619a65e1826ea08b19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED6D 10448 bytes
font_01_sfnt_off000104e0.bin
a072038b2f10547714b311adf16442841e02eb1bd9f128317508f1f9296f810d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104E0 16572 bytes
font_02_sfnt_off00012fb2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB2 16792 bytes

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