Malicious PDF — malware analysis report

Static analysis result for SHA-256 1517300742d3d48f…

MALICIOUS

PDF

79.0 KB Created: 2021-09-05 05:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7509a313bcc04c988f3aa0caeb6a2594 SHA-1: 945894efc853434a4f9c618e73c84c3800fb5403 SHA-256: 1517300742d3d48f61820559a7cc5696aa8b161e0da0343de2c101c37e91b064
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. Heuristic firings like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. ClamAV detection and ML classification further confirm its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://oniceh.ru/uplcv?utm_term=event+planning+and+management+book+pdf PDF link annotation
    • http://sanarina.de/ckfinder/userfiles/files/66991111998.pdfIn PDF document text
    • https://angkalaris.com/contents//files/37756180754.pdfIn PDF document text
    • http://masonhn.com/d/files/mokiw.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/forenogasigexujud.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5941e1ecd---23243252954.pdfIn PDF document text
    • https://mmoxx.mn/userfiles/files/tavexunomaf.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/71975080605.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/6483973483.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0223fd450b1746c2775e765c2a1d32cc/fomopabogob.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/17951994273.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160abfd8509bbd---86186397117.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a37e0701a22---96479484521.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/46037479656.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/misejerunukopesatetatixa.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/47096775243.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/97413105756.pdfIn PDF document text
    • https://melz-feu.ru/upload/66114643275.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da3caae854---wokorebakosorikepoga.pdfIn PDF document text
    • http://legendtec-eg.com/wp-content/plugins/super-forms/uploads/php/files/hk5selibt5f3pt9clacqcg9ll1/51944908178.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/54625321146.pdfIn PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/fojisetikabinobiwejatuk.pdfIn PDF document text
    • http://elcivan.com/admin/UserFiles/file/19300091394.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA66 10856 bytes
SHA-256: f8b2008eb694a99ae87c27f62c925cd28831c7a2e76eeef54fb7d33c6c66ef55
font_02_sfnt_off000102f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F9 16616 bytes
SHA-256: 2b2097340b984cbe95f8ad779113897051c9047423cd9a68cb4937f8b6d784a1

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