Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4e0373ef391b5c…

MALICIOUS

PDF

128.5 KB Created: 2021-07-02 13:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 76565c25c393dbfc0f6ed4f72acf2088 SHA-1: d59ff93fe694f9d6a42999dcb5d061e5fa8573f3 SHA-256: 9d4e0373ef391b5c6e731e5a1a6298a1987037b844dc9a0f47bf42288940e892
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The file's structure and the presence of external links indicate an attempt to lead the user away from the document to a potentially harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://ayhancevik.com/images_upload/files/pufuratirex.pdf In PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/4a9320ef7936768be718c962bf445ca6/33753985422.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/tb0ocpn56cego8sk5aea53elfh/47738394841.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/e0066a1ea6589a61ba639feb5b34159e/kokofovigirugiparudiw.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/68745800547.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/3ba361a817cf379e45ff0ec1483432eb/1524321211.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/wumono.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b691280cb0---tinedaxipiwivomipux.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/179d28618d5a3439d9a9d13d1665670b/xososusadikobu.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/43bf9b81a90ad6c6b072d0f488499586/14759852681.pdfIn PDF document text
    • https://avvocatoboretti.it/file/95222416105.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/belovo.pdfIn PDF document text
    • https://pcstaiwan.com/ckfinder/userfiles/files/84782964613.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3bdbd1d8d---lezas.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bddaa6c6ec4---sutuxor.pdfIn PDF document text
    • http://nanumed.ro/uploads/files/4010404451.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/xireneful.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/kenaguxuvapifujodugomipak.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/d27e0e42401d19a782754dec6c010f14/xenuwu.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607f18fa9666f---mipafemonokiperes.pdfIn PDF document text
    • https://tappowine.com/file/18065681859.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/demotifadalisara.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/d681b5391c7cae6ec99e02beb55b8fda/torejojipidurerugagono.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=one+night+at+flumpty%27s+free+playPDF 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_off00019565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19565 17496 bytes
SHA-256: f540143c1c6339bc2f91ba11ac2a8813e92f1c79b3dda42091bd522345f71b72
font_01_sfnt_off0001c366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C366 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001db7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB7D 10956 bytes
SHA-256: 024c1cb518012f094a6c20557de95558d75bcdb3afe0a5370ef3b94aaa392a0b

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