Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0818b3ddac53e8…

MALICIOUS

PDF

90.3 KB Created: 2021-08-28 22:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 119459f51f1a60b0e373a0cf9295fd7a SHA-1: a7d550157874170216e1932f2897dabb16516efc SHA-256: 1d0818b3ddac53e8b99eb29197e2b6cdf23cf818b0b3404aa0ae25a03a349466
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, indicating an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL targets are indicative of a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://urbancollab.com/userfiles/Proj_Name//files/dujezumaxefuganigomafukiz.pdf In PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/bdcfcb913e4bca22f7a083510f7ebaa0/7161630558.pdfIn PDF document text
    • http://dallassymphonyleague.com/clients/1/14/14bb4a025281f1a32078cb68571f7cf3/File/xagozosuxizexapewazovo.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/6f420a1f70c344371f060700bf9a05c9/jeduzafogakej.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/t4jbq16c6ggismtf23esvo5dgb/sifutogibuvefofuku.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbd5ee7c21---vovimejeponapufer.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/tinogo.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/nupabotataturawudulejusur.pdfIn PDF document text
    • http://hoclaixebinhthuan.com/upload/contentFile/file/19198470394.pdfIn PDF document text
    • http://texasstatealphaxialumnae.com/clients/f/fe/fe72632f573fdc77cca6b85875c63e8a/File/96230748690.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/64477905d622a2b86c851030540fc0d6/25429380686.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a32a7615492---virubenonulizibumukukes.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/8qojkqvb9k09uouis4pqaqqf1l/makifuwelezeremafozasowof.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfff9c5d06---93923344431.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/temonejudomep.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/eff1de39851993e3e48f95ff7b177c70/70268368444.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/56383090542.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e0a2cd7bc36---dedokijixivur.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/f2db5913409b575d4677cfbd64e876fb/rurumiveketanivazega.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a74b94cb8---vepepaziwuvamopaz.pdfIn PDF document text
    • http://gsoutreach.net/clients/e/ea/ea4f28bd0b090870cbed8536b6d1d406/File/wozegume.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/retodarokexinupijujakebon.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/9862551908.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa59a180617---64145999126.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094c7d36d0ed---17085130267.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/68ca2b9e6763e1c393b3fe9327a25362/18971022980.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=meaning+of+intrapersonal+communicationPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF938 10916 bytes
SHA-256: d3a7f361ec58d6e611aed85470a28518d7d77ed96988324bd4fd588da34eb916
font_01_sfnt_off00011281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11281 18388 bytes
SHA-256: ad8666e35c44d66df8a8caa9eeae98bb0e9bca1ec056d4655fcb5ee0bb91cfec
font_02_sfnt_off000142e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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