Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a5729721de45907…

MALICIOUS

PDF

81.9 KB Created: 2021-07-15 23:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 37ef3c3638f79fdd7f0762eb8a611deb SHA-1: 994f362f3c4f19c358fcdcd27758b19aef2656d5 SHA-256: 7a5729721de45907e9bf97acaded63873f206559d8023c53d27ff698da205ae3
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farm heuristics, indicating its primary purpose is to redirect users to external sites. Several URLs point to compromised CMS uploads, suggesting a distribution mechanism for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://0930actress.com/files/files/17362332745.pdf In PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/e3b30a41fd5bc12239d844538cdea0b2/8741872827.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071124095be7---lezilit.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a12eedc59e---vimovo.pdfIn PDF document text
    • https://lesura.net/userfiles/file/redapu.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/a98dbfb77e8eb8ffaddb8f0f4224f542/beramofuguvuvek.pdfIn PDF document text
    • http://bscartridge.com/pic/vanugodok.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e3773d9fe---zukomewisogiputofuzewesos.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/wodimeneruxizowu.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/c38g07spn5f895n6s9aokkthge/kesujevurexogavavunena.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/61805235352.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abeeae8bdd8---gapejapokomuv.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c035b684ab7---23579291333.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/figikunisuvoxilimigom.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/befunobadolamubatilix.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/jefuboviw.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/86d28d7c4aa8a2ca4ed52d4294f8576f/95922183582.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/gonafa.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/tamewefufebiz.pdfIn PDF document text
    • https://unicornccc.com/ckfinder/userfiles/files/80504208934.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3198fbbfbd---duxedomitex.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/1937818428.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b7db3c03f---pafituwanufoxerexapaj.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/53224385649.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=fossil+me1098+manualPDF 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

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_off0000de09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE09 16776 bytes
SHA-256: 63f0e37f6cc944b58fc465f036c5dde84fed0b49cfb525507e2ffb59969bc19b
font_01_sfnt_off000109eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EB 10700 bytes
SHA-256: 1fe79ca62ed00a8db443d8eb207335535090c06d9323a8ac6eefbbb22a2e07e7
font_02_sfnt_off00012277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12277 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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