Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc3e42bbebe9b747…

MALICIOUS

PDF

86.7 KB Created: 2021-06-29 22:21:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2d96827c7316777b149699c549f146e1 SHA-1: 24532fe8bfb9c05467b35dd11c64aee2cd6928b2 SHA-256: dc3e42bbebe9b7475dd6a5c189bd2da8250d894d99abecf1b949af3e47347544
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://mednet.mk/public_html/upload/userfiles/file/mavesarazugumorowiwiso.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/f7870bdf124000421b84f0b1ba903657/1427622192.pdf
    • http://schs1968.com/clients/861610/File/13897161045.pdf
    • http://tuzvedo.hu/elemek/file/16127783763.pdf
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/1040266541.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44149e9494---28807423709.pdf
    • http://sacoorhealth.pt/site/upload/file/kogesabugeborol.pdf
    • https://cardion.dk/gfx/fckimages/file/ramuloxakatel.pdf
    • http://www.contectrade.hu/fckfiles/file/valol.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdb70d227a---77586909777.pdf
    • http://www.companyforte.com/imagenes/editor/file/4191190142.pdf
    • http://grandinspirations.com/clients/75274/File/52123706773.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c37f25c48d9---81757051961.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0c6b13dff---49515227373.pdf
    • http://alibabashipping.com/userfiles/file/lunotoketenapuvixesowareb.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/d08f5f8bf7789b8928592c17b10a1c7a/6681080369.pdf
    • http://phannhan.vn/files/usersfiles/files/vepipafikebemepugefiw.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/f1012d0ef8855ac924e0c5f97d9845cd/denipisenedonofaderawa.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b35085bbafc---lezuvamitupuninigosij.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/9gnajstolbenr384lus643ru32/joluwuguzev.pdf
    • https://hometeamcorp.com/images/usr/tejiwujobutoxo.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb5671a5fe---bebisovekeliz.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/rj2ap1tpcpk77mqkusth0cus0l/40028562592.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=day+by+day+meaning+in+tamil
    • 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_off0000edd7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD7 16792 bytes
font_01_sfnt_off000105ee.bin
38aee9e33a70e774d8fd145d2ee5301a5c2d3d1b59e2d5295cdf3368ccf55dcd
pdf-font-stream PDF embedded font (sfnt) at offset 0x105EE 10460 bytes
font_02_sfnt_off00011d69.bin
637f6385b44cb380a3d48e7da90958d4dc4b047fdb3afa0dbb764e14f6821361
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D69 18004 bytes