Malicious PDF — malware analysis report

Static analysis result for SHA-256 b468b9ca039e825f…

MALICIOUS

PDF

96.8 KB Created: 2021-06-26 01:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e4df9dac8ac21ca0b4e812e1c27960a0 SHA-1: 7873e585ff597cafc54d9a0683c012a6dde81d74 SHA-256: b468b9ca039e825f06f1e7282f06c498f33337e940be21d2eddc6067ecac4d63
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of links, many pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9811

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://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9d5d2e44c---67217065332.pdf
    • https://doanhnghiepvietnam.org/img_duhoc/files/39713051662.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16088d7fe052bd---pesufazuwuzepufaw.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/61dda71093b2b0fc99f62f1b551b39ce/lorosukusekorajiwebufe.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b6eb250c5---mebegabemisudiniwemipi.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50b40df45b---23601149323.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d304228437---65347106955.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160722cadc4718---99341016326.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/4bpp564flf09kc8jf8b41tmj59/38141197798.pdf
    • http://tremonttemplemacon.com/clients/862779/File/vekuz.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160872e953a857---paniboripi.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/u973i2b0hqq85n03kdonkg032p/31226371565.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/d0190slr422qeednf1uiovad62/19116652590.pdf
    • https://alakharia.com/public_html/userfiles/file/pexabezevufone.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/89qbv4h4jcbab889mc1sd4c6qd/72960794622.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5f560123f---58371802651.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722b5bd0cc4---81913118725.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160807d640880e---45048139205.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a016acd836f---28631288544.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c8c17e86df1e49ce5af0fd00e45f9f67/98700417365.pdf
    • https://nepalimodelagency.com/userfiles/file/12205857057.pdf
    • https://cardion.dk/gfx/fckimages/file/47684455079.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc8d42dd08---868932057.pdf
    • http://rotarylaspalmas.orgdocumentos/file/14735839410.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=v380+pro+for+pc+english+version
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f51d.bin
18c388b43a485c03063627c919be0ae16d3546e5ded902621e0500d6ffce22c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF51D 1832 bytes
font_01_sfnt_off0000fdb0.bin
ede31fc0a4f0f2f86b4ac79cc4085a23d476ea7ef4a823f2fd2b7821dd20fd6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB0 11036 bytes
font_02_sfnt_off00011743.bin
9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11743 16092 bytes
font_03_sfnt_off00012c88.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C88 16792 bytes
font_04_sfnt_off0001449a.bin
6e4f5f5ba29c4806ab186a1e298ce4de8af519f333241e25cae81cefd897338d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1449A 18000 bytes

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