Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce457e2e628e7cd4…

MALICIOUS

PDF

87.5 KB Created: 2021-07-19 22:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7436579259e5ee032d7c34e22e03bd0d SHA-1: a39b0e80885ac6b9f26d5c1326fba729f37aacb2 SHA-256: ce457e2e628e7cd475004eb8165221eddac201efb84630227de50d776f5f7014
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress upload directories, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/m1n502mt4ffl1a9micmsr430ae/dapakawa.pdf
    • http://xdata.pl/app/webroot/img/ckf/files/rutede.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/a612f066913070a136dbe131aa5d231c/33192946152.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/6bde465efffa3a0f0f06c1af7899a49d/23030706724.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/7a74e0dbee42bd36f0af2d2d92044349/93976892351.pdf
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f229eb5d10---talapekidiz.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16071a29625065---26430389200.pdf
    • http://qataminational.com/uploaded_files/userfiles/files/39871906723.pdf
    • https://path.mn/userfiles/files/zukesotu.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/7eb14cc7b59702e548456fb423fc5928/palikabetofaniwu.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074feb6b42d9---garebaxeli.pdf
    • https://theelementrama9.com/userfiles/files/26935025911.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/6c6d532829d7cd7e5a850b5e001b229d/67644851402.pdf
    • http://www.findvoters.com/userfiles/file/5363286881.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16074838be08a6---tolafojozalujukivusok.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/4667457abf3b06ca07d932a65a1834b9/91513381755.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083a7f8d25c9---74899008186.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/5ab7e82e46f596c23db5957467169fdd/6006124881.pdf
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/965a9aff3c9b8023977e567dd42274d8/diwanubowopuzus.pdf
    • http://elhammagazine.com/ckfinder/userfiles/files/1787066787.pdf
    • https://mollis.rs//files/96500565320.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16085a062b3e5a---biribisira.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/j21i8o4oo45e061chsnte4ec70/68389368912.pdf
    • http://studiotecnicopetrillo.eu/userfiles/files/7864217163.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa729ba802---83255614132.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/65579fd7166cd9f20c03c0de6cde0c64/rinuwela.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=monster+truck+show+san+diego
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2e3.bin
f6bcb83e7b4fd6f0b977425e77a4ab05f404f27926562d1ebab81d9faab05950
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E3 10876 bytes
font_01_sfnt_off00010bdd.bin
99de6a5f05d890c628b24649f7521daa381ef76705025c0304c3e3638910946b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDD 16960 bytes
font_02_sfnt_off00013857.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13857 16792 bytes