Malicious PDF — malware analysis report

Static analysis result for SHA-256 0606fdfcd8ee8e16…

MALICIOUS

PDF

86.5 KB Created: 2021-07-24 04:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5f7c1f350679f19421c1ec337aa2c037 SHA-1: 6b29cb58e8ff513bec9afedde7c0ef0a4c6bb664 SHA-256: 0606fdfcd8ee8e16beddb6d02f5b10ca8f11aac965a711ec678af12430dccba4
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on potentially compromised websites. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to manipulate search engine rankings or distribute phishing content. The file's structure and URL patterns are consistent with malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/fc6d70rm8n3hbcq4seumfp9hbo/49716515213.pdf In PDF document text
    • http://crmrealty360degree.in/userfiles/file/21672089769.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8ed1a8c8d---tuzokelururixoz.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/448601504.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607182e54d65a---16149139939.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/38910304799.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/f3894u21p4e7i59rhq1staeahq/81735688371.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608081e7e54b3---togata.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c39502d4cdc---30478410260.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160877863c2164---72474348108.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/975d85a117163e443509087f992a3dab/rivut.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/51317417668b463f7824d4eafe98e973/17045204608.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b34747e71---8584972154.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/76280332483.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d1d0b2545---46456893211.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/f984b6d8613bc304e5a9f4c5181e904a/fomirojuvoj.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/5c6f113d3239d19331a88657db32085b/32198999711.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/87323085809.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/111b68d75914b4709d2c0bc4916be28e/74200022468.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/54619396655.pdfIn PDF document text
    • http://coffee33.ru/archive/file/panoxobodafutemebur.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/kezekuxutenerukar.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/1859242b580429b3b106cc26af0e2a0a/lijeb.pdfIn PDF document text
    • http://e-hematologica.pl/users//file/91578796811.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=food+hygiene+worksheets+for+adults+with+learning+disabilitiesPDF 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_off0000ec5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5F 17332 bytes
SHA-256: 09b8085ac31a715f7976ab43b65267ce569001272b9198e03d162d334ba7c8ad
font_01_sfnt_off000119d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131EC 11140 bytes
SHA-256: 4af898b8fdf6b9eca57a8d13d5d04234ff0050f64ab0739576e9b113d69f203f

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