Malicious PDF — malware analysis report

Static analysis result for SHA-256 7399a741ec1b05ab…

MALICIOUS

PDF

87.2 KB Created: 2021-06-26 00:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 70c061c1ac92c0b422876a318bb396b5 SHA-1: fb55d164af76af4fbb1130f43b36a62a61071449 SHA-256: 7399a741ec1b05abc87c60909d98834160e16bd5be70cd7686ef17bfd0048df9
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to lure victims through deceptive content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://archism.ru/uplcv?utm_term=who+is+the+richest+person+in+the+world+as+of+2021
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608744f7e2289---wilubivuvawoladejezapawe.pdf
    • http://www.hydro-tg.pro/upload/file/zisavosekif.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16088161176733---12805967191.pdf
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/501747e3787f0b632de013dd80678a9c/65758617102.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/4bvjsd345r2s5r675j048670r5/nawupoxazola.pdf
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/jolediwiki.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a508618e32e---69352838915.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160be74cb924c5---sujajexodelejelu.pdf
    • http://autavrabek.cz/obrazky/file/wizazo.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20628eda71---73776582751.pdf
    • http://chickendaylacrescenta.com/uploads/files/bezedobilapu.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/a726hhucg0j9kedl9poj33m4e1/57177399292.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608178c67107e---rexevotanedetatadijoradi.pdf
    • http://autoklej.pl/app/webroot/media/files/dilumaloxutupipufiwudoju.pdf
    • https://mzlpro.com/web/img/podborky/files/85066639324.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c38ec5ea350---pokewedux.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/pp1qhepjd04jpipcj9tj4ocn37/40126873157.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/kimtj318hpi4grvtli4t4i4ajg/272446848.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e318f1944d---22667190312.pdf
    • http://tremonttemplemacon.com/clients/862779/File/burujutezawawojijun.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/d02fb2f62de20b13683f1413902ccf80/sesodotiliwijuwasa.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/1d2d15fac08693057f31834a2fed3fc2/97637994586.pdf
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/b6b272a4a4964777aec7afd7defd2219/82594629121.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_off0000ed83.bin
f528c8d7ed2d3902cfa222ff4e631a704a3e98ce0b920c1d4791338ef4588d1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED83 11088 bytes
font_01_sfnt_off00010773.bin
ac2de24816ac142291037b1f16afe93bb215c2a7e62e27c7bb069a698d5a1ba0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10773 18396 bytes
font_02_sfnt_off000136e4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136E4 16792 bytes

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