Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d3d0f4af0bf801…

MALICIOUS

PDF

69.6 KB Created: 2021-09-25 21:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: af961b2a33e0c17d2e38693534585628 SHA-1: afd8f7f1ef6f1795d1168d1164f38bf1d9a99fcf SHA-256: 02d3d0f4af0bf801a45fe57749ab0ee82ae91966b669308212df8001782dd599
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to disposable hosting and compromised CMS upload storage, indicative of a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, and the document body was unreadable, but the URL structure and heuristic firings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cc50d785ca---17535753353.pdf In PDF document text
    • https://ymvii.com/admin/upload/files/goranegojexuxeme.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///59102151458.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/99551002239.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/68333798837.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614b1d8857341---judaniwozotidaweb.pdfIn PDF document text
    • http://isleford.com/filespath/files/20210916131855.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/40380838170.pdfIn PDF document text
    • http://mtegl.wsystem.sk/userfiles/files/5042859368.pdfIn PDF document text
    • https://soechi.id/userfiles/file/97379392090.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/cd6bb320d4bc0cc5b5894ec3411e627b/zulafamifu.pdfIn PDF document text
    • http://brukbet.com/user_images/file/nopiforuze.pdfIn PDF document text
    • http://hejia-ele.net/upload/47078629740.pdfIn PDF document text
    • https://swaarm.de/app/webroot/upload/files/liwufomofusomep.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/lopakujulekisapi.pdfIn PDF document text
    • http://video-cycling.de/files/file/35526788202.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/11011108117.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/bejedexe.pdfIn PDF document text
    • https://www.ksmt.edu.np/assets/ckfinder/userfiles/files/mosigobanuledovu.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614457005c798---93313325467.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/98492403701.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132cca20292b---44738863943.pdfIn PDF document text
    • http://fine-trading-knotwork.de/uploads/media/rarate.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+get+free+robux+in+adopt+mePDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC72E 15836 bytes
SHA-256: c81ee3ddf2bf447e9585f7c8a9a2b6ef01cdbf0a106eaa4d5a360793b5647aca
font_02_sfnt_off0000ef8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8D 11044 bytes
SHA-256: bfa2d4e719598911cfb5db0cd11cf4ad213c3c8e0265cf4e8c80a4d300f472f7