Malicious PDF — malware analysis report

Static analysis result for SHA-256 60feee24663fdd10…

MALICIOUS

PDF

87.4 KB Created: 2021-09-05 14:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ae7a6281240c8d5b67d3b045144b26c0 SHA-1: 3b4d4be00a171b3466e93779097efebe80dfa3ed SHA-256: 60feee24663fdd10b29fbca44dd614cf83dcdb285d869996347902cbf2f25024
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://chcial.ru/uplcv?utm_term=industrial+gearbox+maintenance+pdf PDF link annotation
    • http://opakowania-loga.pl/zdjecia/fotki/file/bipagiginap.pdfIn PDF document text
    • https://newfrio.com/userfiles/files/8635923675.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/toregiwibasetivixuwone.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/qvr4vtd55mjrlujf9eeii69o0c/vabaloruxebavuwozekimo.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/nekeza.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/ecb8679209db911d3182fd0f6484f1ba/35413646847.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/vawipub.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ff4cc64e752---80627345589.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/6atgrn8pom49l5up0vt0ah9rd3/vozatidedosobezodulajar.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/64b8b7c1177ecc5c08253400cf4c6f9c/99389715607.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612800a17bd0f---11917386890.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c25b1d729a---wimepojupipeg.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16089873ebd8be---mabesaso.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160e160212f29c---nejodosuzevavemu.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607843b1372cb---86794514260.pdfIn PDF document text
    • https://njshore.drinkpoint.com/uploads/files/87688617408.pdfIn PDF document text
    • http://xahuaheng.cn/userfiles/file/51444152326.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/76370992538.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607055739da47---38545141822.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e0f5e1e1d---23014049008.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/woliwawisudef.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/48b2cd7d4e7b030e1b2a8c49dffd1a1c/dibuboxiwusabovetuvesa.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/2ahrul9cv6pq7hq4rdumsdh7b2/xuzarexigixime.pdfIn PDF document text
    • http://oilandgaswork.com/userfiles/file/72473634454.pdfIn PDF document text
    • 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_off0000ed2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2B 11256 bytes
SHA-256: 1b26c4ad8f9a39c03b8ce085cfe0bde4509f1520853340fc0b82836c92c51a37
font_01_sfnt_off00010726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10726 18556 bytes
SHA-256: b7d92c0f2b2a992a0c39dca4d6530d71e8e55a102f2f79df2e64fe2d82e01a34
font_02_sfnt_off000137ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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