Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7f899f36061927…

MALICIOUS

PDF

88.0 KB Created: 2021-07-19 07:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f73a7d0ba23d09410977adc419f23305 SHA-1: f53f357835e68e58ee1f4b0082a789dde9d2708b SHA-256: 0e7f899f36061927d78121bb6cb5bcedc2f8d6db5b23db20ba38adcb657f8039
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or malicious domains. The presence of numerous URLs, many hosted on disposable or compromised CMS upload paths, strongly suggests an attempt to distribute malware or conduct phishing operations.

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 http://angelojrobles.com/admin_initial_test/userfiles/file/wemufolusajuduvimesejir.pdf
    • https://www.nstoplana.rs/ckfinder/userfiles/files/51596720480.pdf
    • http://heyumpnd.com/userfiles/file///juwedatuzonolum.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606efd63a194e---milopefekinakebikozodajo.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49cc7a0ed8---gozoxepewu.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6921e45886---poluxizojadasom.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/ea8f03217f3d69b8b075af23d27c66ab/fitoruzude.pdf
    • http://etcad.net/np/upfile/file/12385777800.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/5a8ac7560ec7d806ae55d1ad30993629/bolerogulukobaja.pdf
    • http://www.egavilanes.com/ckfinder/userfiles/files/joxevigexezezug.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6925fbd7a2---lolilijuribogozowevifis.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/f062810df37a6400383708ac35eb1fa2/rorojasimifakowixiwawof.pdf
    • https://hattoco.vn/images/ckeditor/files/wurivujiso.pdf
    • http://zoncmswebsitebeheer.nl/files/editor/file/tikarizozupet.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852d8b6d12c---kuwajelamowiwabetiniseven.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/1412761e724bad627e7217f66d60af6d/12514982085.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/b2sakp8s73j8h40mg46lohdsce/fumelorizu.pdf
    • http://agataklimowska.pl/userfiles/file/gaxorer.pdf
    • http://limuzine.md/userfiles/file/sifomus.pdf
    • https://scavilecis.it/userfiles/file/75455236072.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a61b7461b35---jukagewubad.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c733f5a369---zakigezawazevirele.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1051df2084---jekedesatezazowas.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=saturn+and+rahu+in+8th+house
    • 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_off0000f68b.bin
16ff795f779b2ff9123eea4dc5d5daca4cfa6ffde21b833b27ac62d888706afa
pdf-font-stream PDF embedded font (sfnt) at offset 0xF68B 16456 bytes
font_01_sfnt_off00012115.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12115 16792 bytes
font_02_sfnt_off0001392c.bin
9d655ffa46e3cf593d5f7ca0769ebecb9aade787b6817006136490e275867249
pdf-font-stream PDF embedded font (sfnt) at offset 0x1392C 10680 bytes