Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0119dac58f73190…

MALICIOUS

PDF

97.8 KB Created: 2021-06-26 01:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0cc92ede02c12d9d0fcc1f2eb96b136d SHA-1: f16d282b2c1e79f113e9a0c9b543d2601a9cc94e SHA-256: a0119dac58f7319027fe5e65a7a35a908d904907edbd8c73ad9e2c62d20e2d7b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to distribute malicious content or engage in SEO manipulation. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the presence of external URIs and link farms points towards a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/uia8b487oqvcabq74mo35r75i7/didajajitomujarex.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16078569b77a84---44257105818.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/527c14c4bda85ad6162ce32ae24b405a/konilifuzizubesabanaz.pdf
    • http://siembra.me/uploads/files/rivijuzutulefe.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/d51bdd67774fbc1d4098ef4dca3307e0/19255473847.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/9uinnjb271ech7hual7sb0f1c6/nugazovivusij.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/i43jglad07obni605fga68nth6/wimevojilafakuw.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987bc136edd---781725725.pdf
    • http://xn--42c1dhzaq5aeb.com/userfiles/files/99863419449.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077831654774---wevujilowele.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/e9d17927ea960397253717e11c04473c/ridofujabinorakefuwomezi.pdf
    • http://computerdoki.hu/user/file/gufepuxikejefuvujuva.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad92065a641---gowow.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/2782ovr3oq0ljrdp2tca5kd799/tanifapulob.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/29a0ec9u2forqko101612s40t3/dinan.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/6eb5c4ddabc69afc994c162fd61ec6df/kunofoparemipup.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609644a3de9c4---xaxutaviwexikawukomivojim.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077a8a8a8e7d---vegomidafizekixagufaxi.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/7sn90pnungahodnn0l5lirpnp2/zowanirigipag.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca6d809b7e---38312733318.pdf
    • https://vegan-eshop.cz/data/file/57297064887.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2dd457e71a---19733183079.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f03375710---55969441902.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/0f35d07c9b7741f5d0531f0c9cafb1d1/bogilopivoru.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=sample+interview+questions+and+answers+for+accounting+position
    • 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_off00011804.bin
16372696795e9959e6eaefeb2bdc35cf261e3958bcda515df790bffccd6e6e0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11804 11436 bytes
font_01_sfnt_off0001327f.bin
3cb30ae552336bbc8e5a6c7b84dad383661c569eaf1bca1114109108cb16792d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1327F 17792 bytes
font_02_sfnt_off00016127.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16127 16792 bytes

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