Malicious PDF — malware analysis report

Static analysis result for SHA-256 96fcab1101bdde5f…

MALICIOUS

PDF

90.6 KB Created: 2021-07-13 21:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0c81e2505f0f51454d0aa4a640e58898 SHA-1: 6c29f7eed6c6855f67b6d9532185569267be001d SHA-256: 96fcab1101bdde5f5c70a56197a01b139e473e685df03b74b718c947ea3fdbb0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to obscure the true destination. The presence of these links and the overall structure indicate an attempt to lure users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/jomcaua5i72rulvdaucgbq9hgc/wonaveluloxumifoxoturafen.pdf
    • http://stolizstekla.ru/userfiles/file/lezixoxupowo.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160796c835a9f2---fukububewunugarijo.pdf
    • https://ikansambel.com/contents//files/12836908950.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/2ff11c65b67562f7bdbfd56732bb5e6b/zuzenemujizat.pdf
    • http://bearings-home.com/userfiles/file/jenaku.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e48cd49c854---pifodokolivojom.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8cf583f83---fetifipagagogupejimeg.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d55546e170---20074037761.pdf
    • http://info56.ru/userfiles/file/fizitodefewibofaxek.pdf
    • https://patc.fr/imagesfile/47830178702.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16097b8b5936cd---figebetakodojuwaralasol.pdf
    • http://mvclassof1990.com/clients/8/8c/8ca0ba2c7a07c5cd1f21f9fc323c16c5/File/95357638431.pdf
    • http://sanruou.com/app/webroot/uploads/files/zofatitezaw.pdf
    • http://alexandraharris.com/clients/36054/File/jezoz.pdf
    • http://vyveva.eu/UserFiles/File/91525011242.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/64a89b4c1cdbfc59185424979d08fef6/65537784193.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087849914da7---99200434119.pdf
    • http://kino-cosmic.ru/sadm_files/52998208480.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/rdn0jlbvjar119q1jvg6jh5fa3/ruvusewen.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779125dabec---zagujexutivavinufosuzida.pdf
    • http://eiak.org/upload/editor/files/47919903021.pdf
    • https://maxflowfans.com/userfiles/file/nabalezurafaj.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=fast+and+furious+tokyo+drift+watch+full+movie+free
    • 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_off0000fc82.bin
2cbd7e245b22fc252c880b5756827fed7358ab22829df642376e56086a641b56
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC82 17712 bytes
font_01_sfnt_off00012ac9.bin
9a3346e2cd45804fcd138967b957ac265f06f0b55b0df34f5d7778fc4f62eddb
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC9 11176 bytes
font_02_sfnt_off000144d3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x144D3 16792 bytes