Malicious PDF — malware analysis report

Static analysis result for SHA-256 c01c0006441c232f…

MALICIOUS

PDF

102.6 KB Created: 2021-07-01 21:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2fe054a4d025f9104116c6fc2f383e5a SHA-1: f5fdb3f2b827936753d313aed504c4324bfb41dc SHA-256: c01c0006441c232fc6acb5db50363fe36e327b18a64ba1817327a1d3a9f77643
196 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicative of a link farm used for phishing or scams. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly suggests the document's content is designed to trick users into sending money by promising a prize or parcel. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9887

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://wastran.ru/uplcv?utm_term=bsc+maths+books+free+download
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/3opi7qt81aa1g6423fnlgvr24b/86475771087.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/aef4c1561336f210ebc3b1d20b2d0083/ruwumulavit.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/e5f82258753165c9ef50351177bbfebf/zozepowepe.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/80a512355a904890f6a3f182825ac6ae/jazuzejep.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/92fbdb9cc76c67c03a3678264a3e56a2/wenadetoturura.pdf
    • http://alacarte-design.de/userfiles/file/vijisojevek.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790befc3d6e---tuxasilubaf.pdf
    • https://ost-fogging.com/upload/files/80395578170.pdf
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/b2c95719d498d117ae9758435efcfa3b/28212693266.pdf
    • http://abpaluso.com/upload/file/75060126281.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949c743367d---soxesafaxukimi.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/5242ef7d4b10ca7775f5b58cb6c67a50/1453941933.pdf
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/ebef4f06cd21f4362c8e8b0da06f87c6/tezoguvusalosew.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2d8630098---gasebetaxukosode.pdf
    • https://alnahamgroup.com/userfiles/file/31338958843.pdf
    • http://coyada.com/up_images/up_images/38291449260.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c400d266d30---litobideguronotamuw.pdf
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b63f099be94---molakogotovugoda.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/b58b77fd06fb3c969213b796df83e94e/petusujorapip.pdf
    • https://samarpanbharat.org/trila/userfiles/file/88786916340.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/r09d9s2dm8jsnbdlt5otk2mq1m/95226066228.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d15770ecea---vuwaxiwunozase.pdf
    • http://beiwendq.com/userfiles/file/12506009538.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/i0nbu3ncehg9eqh6eqj2glejgc/lekososisimogunigukulew.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0a1381f9f---molamafunukejifivazesalod.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011040.bin
4fe62569291a7195634af2f076233534ce73bfd993f79dbb4b07306f327f95e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11040 18484 bytes
font_01_sfnt_off00012dd7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD7 16792 bytes
font_02_sfnt_off000145e9.bin
3de3bae9f8cbe7a46df06936deec14c64fb40f94e5e33f3480f2837ac92dcc62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145E9 17228 bytes
font_03_sfnt_off000172f5.bin
93f13e12e9a95fc021c9ff1004d33149c0c49031e10ef35311ab4f5d1506686f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x172F5 11020 bytes

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