Malicious PDF — malware analysis report

Static analysis result for SHA-256 74defb2286ce056b…

MALICIOUS

PDF

74.8 KB Created: 2021-06-27 09:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d2cab0d9955221b5c5328b19aca100cd SHA-1: fb7bd08063e721130bd1fcba960625bcd129bffd SHA-256: 74defb2286ce056b0721bb866c8e012b3b955c9ba936e31ecafe833e9718fdfd
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS upload directories, indicating a link farm designed to redirect users to potentially malicious content. The document body is unreadable, but the heuristic findings strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc7ae2087a---biboke.pdf
    • http://smepil.com/ckeditor/userfiles/files/toroneditiwufula.pdf
    • http://stagnesreunion.com/clients/e/ed/ed16748122b3ff8ec97113314e0446c4/File/65844656711.pdf
    • http://kraski-chernila.ru/resources/file/46293812467.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b55cee5addf---wesomafapejejuw.pdf
    • http://alliance-ic.ru/uploads/file/66109565387.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608f47a22a07f---89237303574.pdf
    • http://arniestribu.com/campannas/file/42107880396.pdf
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/kidimadisagewuduweluv.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7182097c56---64087516480.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075ca24cbe21---71113577666.pdf
    • http://atthaya.com/file_media/file_image/file/xuvoperitegipupivipam.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98fefb989c---24268784136.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160924dff69702---22365869935.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b6eecba6e---1533508324.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b641ad363d4---totelo.pdf
    • https://vyrukrc.lt/userfiles/file/11086181744.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/1d5702432e72e957d1c51fe21d46c8eb/1740209173.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/7qsvlmdn6bq2ra6mppl0os9p55/wujeserepe.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e17aaf49d---11798118086.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/416ad7dcdd0ab9615d141f2e4eb5b76f/jufapasidopupodivasoroj.pdf
    • https://acronimocostanzo.com/userfiles/file/vonik.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821bff4545c---dalofiziwenubos.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2a0c39ef6---tafomulobubukijo.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/14ec7691bce6f9a510c0cd4fbd09f1fb/xulesakilopajujipulawezo.pdf
    • https://bodegoncriollo.com/userfiles/file/posatorezuwemogojonixi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=in+according+to+meaning
    • 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_off0000c522.bin
ef8a622445855289da964a1d973e68786793ee3e6fbb6e717e5065266b0e3270
pdf-font-stream PDF embedded font (sfnt) at offset 0xC522 10452 bytes
font_01_sfnt_off0000dc9d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9D 16792 bytes
font_02_sfnt_off0000f4af.bin
14308d77661d129a963c6f9562a464f14aa478df2a02148b9b3533ecccfffe85
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AF 16128 bytes