Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c20ca0d95c03ab…

MALICIOUS

PDF

74.0 KB Created: 2021-07-03 02:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 04440cbb0a83f5380391543e4ea5a1a7 SHA-1: ee44074a74cb01dec7d48c4d5086cfceaefead6f SHA-256: f6c20ca0d95c03ab5836c65cb080ba37c50a4ac1e7b37a3448544b5de059f444
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute phishing content or malware. The primary attack pattern involves luring users to external malicious sites via these embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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=sell+meaning+in+telugu
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b44c11278ef---rorenewediwibile.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085c3fccc218---90734957287.pdf
    • https://yuss.it/file/zutelepagibibabebedukeze.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/4374e142d446c9d0a3cd1a556578eb65/muletitozivaselitojanak.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af7de816246---bugobosadogokiwipetoxe.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a4723d3c50f---womutolufajurun.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/ea92d097d72037b3dbfc49dfd112fffc/wozijolusasopad.pdf
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c5872fef4---60185317875.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/d3906ba0b731032b45ae7905eb3b4474/tovozijusopiwifibatipome.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d681d418d---zatavavovunawemuxe.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/858d07852ec3b61d8641314755a973c6/gofasidinudedisuxafusi.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/mcdifnaibkogi4n00eef5ajie0/99986509027.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16079c57f4f320---84706016699.pdf
    • https://binarbaidrealestate.com/public_html/userfiles/file/26960007843.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/2bc7bfdbee3dc0a0427da65c1127ab48/mosuvexasezoj.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a832a3182a9---24961820207.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df780d3ac5b---26655725980.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/6441ff0fbbb1b09e9068cd2c68328bd8/69138395562.pdf
    • https://mamotato.ro/userfiles/file/42326519826.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d8bbef8f0---46274462218.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160969399c7fad---20280631709.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cd0198b974e---kekopove.pdf
    • https://x-software.cz/data/file/zeritokenasemowus.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_off0000c0bb.bin
4ef0b37d1edee42b5584523a9a61cef9aa04b7daa8c4aac356455454607c3a74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BB 15908 bytes
font_01_sfnt_off0000e997.bin
4557cead68cbc03893e492df94f8caaacc25c1d045aa44640cc34887dfb3f786		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE997 10240 bytes
font_02_sfnt_off00010094.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10094 16792 bytes

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