Malicious PDF — malware analysis report

Static analysis result for SHA-256 979248f138030418…

MALICIOUS

PDF

92.0 KB Created: 2021-06-26 19:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9005d095af5016e6578a5ce2e251b114 SHA-1: 6e8fc1425ec30313931277ad97a690bda18bdabd SHA-256: 979248f138030418f7205706fc34bc7902bc223a0c06f0851f40d97f343477b5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a link farm pointing to multiple compromised WordPress upload directories. The embedded JavaScript likely facilitates the redirection to these malicious URLs, which are designed to host further malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nomylo.ru/uplcv?utm_term=scripture+about+praise+being+a+weapon
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/8a3a3d78a1fd5061bd7e39fb6366791d/93029073334.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/efv2fi5qgh3kogb2irrsgvi0s1/2324623351.pdf
    • https://alarrabnews.com/images/content/content/file/bogagiritilezikufo.pdf
    • http://ahkkpcm.org/userfiles/58735217920.pdf
    • https://restavracia02.com/userfiles/file/wosogemasibamox.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/9ff7228af259f51c5fa4d87970c157cf/xakezajugupudow.pdf
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/93c122988d9e260eb31cd5d82a598a03/39216362217.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/0be5c6500d9646917a9ef0ecd47bb432/4696106731.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/nju20r046uceq0gav3glgutmib/33610930062.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086df77d9c32---daseduxan.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b43f165e897---konatukulupuwedeg.pdf
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/addec514585f5c35f3ee0f850dc31426/wupewogajisizewewudam.pdf
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/725251f81710fec0b74d8023031d0a84/vilujegigodenobep.pdf
    • https://egf.tw/test2/images/file/6123383745.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160c6674418ed1---80463201766.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d65f6e2209---wujukuriwevinoko.pdf
    • http://ngor2-3.com/file_media/file_image/file/63151510608.pdf
    • http://goergenpainting.com/clients/0/0d/0d1038892961fdbf96b6a8e7e8daca8f/File/51313991480.pdf
    • https://imahima.xyz/js/ckfinder/userfiles/files/18015145018.pdf
    • https://contabil-fiscal.ro/mm/file/61067914519.pdf
    • http://dpsszczytno.pl/photo/file/14296123389.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b5bb10309fc---dutewugo.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d77c5143a8---sezikususapezukeweriv.pdf
    • https://noithatkuongthinh.com/uploads/files/82885885732.pdf
    • http://pc75.net/upfiles/file/1621732966.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_off000101d3.bin
038683f6c39e413a2cb53b5cdf8b6e90307e096f83ba241eb3d7a44c81fbdfff
pdf-font-stream PDF embedded font (sfnt) at offset 0x101D3 10904 bytes
font_01_sfnt_off00011b0c.bin
267205e8e8be96afd27f77d2d1fd68ebc5db0b3b23155e7b6fcc515e6dbffaa3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0C 17416 bytes
font_02_sfnt_off000148ee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x148EE 16792 bytes