Malicious PDF — malware analysis report

Static analysis result for SHA-256 372e68f490fc7495…

MALICIOUS

PDF

148.8 KB Created: 2021-06-03 15:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02eae2248a9bbf2d5ac8f48b18f76af8 SHA-1: b7bc5646ca6c86228122163344020af8b49ce032 SHA-256: 372e68f490fc7495c43189e72e74f192459861909a1e128ad157c716d8895106
196 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of an advance-fee scam. It contains numerous links to disposable hosting, many of which point to PDF files hosted on compromised WordPress upload directories. The document body, though heavily obfuscated, contains references to online movies, likely serving as a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/c3f20ce601706552a42490b15c56865f/xanid.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/087ad8b9f729fd9a89fa78cb96d20fce/83373616165.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5015894113---63449803481.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/8a39e4692b0838e0cc4c33be60248282/22424913965.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160789770d37b0---gamudimozabidimu.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/0urrg6coeqmprkrt806l7mmj7k/ximetezeraz.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160918cd76f0ba---mujalifosaxanoxubefa.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a59b6dee1a2---wabagivoboxenolozuvan.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087f5b789d1f---zujukilon.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160935caa34532---48852142197.pdf
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/cddf884084086cffd4921169e2a25c9d/9968227165.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/67b2f5c660d884db63c6e48cf9f80659/88422691777.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b0403f4a16e---98765350485.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a26832d2d5f---zojigalajidofisupejavamaz.pdf
    • http://baugeraeteverleih.de/benutzerdateien/najuxivaluvozota.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=star+trek+2009+online+free+123
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020aeb.bin
a01164bc8213eb37fca9329631260107031567a5b2c181fb1dbdb8849ffe174f
pdf-font-stream PDF embedded font (sfnt) at offset 0x20AEB 5396 bytes
font_01_sfnt_off00021d5f.bin
cad02225b39c618b6a0b988fe1293e118f33a82b01d43a02a27bc8bfef86c374
pdf-font-stream PDF embedded font (sfnt) at offset 0x21D5F 12248 bytes