Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d82ee0ae73daa6f…

MALICIOUS

PDF

81.6 KB Created: 2021-07-01 22:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 12ff1690f476ed12e420ad6e5bf06c70 SHA-1: f3fb5ffe0aeb3d66594fdb76672c43585a993c44 SHA-256: 5d82ee0ae73daa6fffaa7ac14ad8c62a2d177d43fcfb64eb4457394bf579e271
176 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which point to compromised WordPress sites and disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://e-kva.ru/admin/ckfinder/userfiles/files/pewabazu.pdf
    • https://mariellatriolo.it/public/file/velasuwosoxebid.pdf
    • http://slsnn.ru/content/files/40296266370.pdf
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/0b7324a195100b56a78b493916c29b30/53242157147.pdf
    • http://ipceurope.com/assets/file/70883829702.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/f8be29b85bfbbd34639ff65cf243ddd7/nibonib.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffa2aa2175---10612972317.pdf
    • http://lnshiyue.com/userfiles/file/20210525102631_946374669.pdf
    • http://edanieltour.com/FileData/ckfinder/files/20210606_7F7E49DBAC985ACA.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/916cf9c5ae95a3c40fb25954acf086d4/56583513154.pdf
    • http://aylincinarli.com/fckfiles/file/sulukalimeloboxe.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b31970d1f24---tewimafovanamidezumiv.pdf
    • http://stolizstekla.ru/userfiles/file/87523426233.pdf
    • http://firewheels.pe/userfiles/file/begabodafixoxapatewamof.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d2f45a302---65697249793.pdf
    • http://schs1968.com/clients/861610/File/14699863971.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/g6qksroccj27nliermi43etnc5/23865610625.pdf
    • https://lienlacanien.com/img_pages/file/25678835003.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/a3df7599f67f239393dfa427d5bdb8d3/xubananine.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/88633171495.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb4c368db36---vuduni.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/41f1cd645361e40661a984e6e49f6a05/6773585942.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606c73f701ddf---lidezuxetaboxu.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/b25f7e0b5b19fb5de701953f8f0a86fc/takodojebetu.pdf
    • http://kotolantopeni.cz/file/xenorimakozumikewitabil.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=simplification+of+fractions+for+class+7+with+answers
    • 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_off0000da6c.bin
03372d3c4770d244ad8d4e907d27e5f3a62d82e9789ab7648a9c9a70f88527e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6C 17096 bytes
font_01_sfnt_off00010736.bin
cea2a7e0072fdd582270117febb0d09963e47e5ec538be18cb08d2ed7ea81337
pdf-font-stream PDF embedded font (sfnt) at offset 0x10736 10956 bytes
font_02_sfnt_off0001208a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1208A 16792 bytes