Malicious PDF — malware analysis report

Static analysis result for SHA-256 e57a16782cad50db…

MALICIOUS

PDF

85.7 KB Created: 2021-07-15 18:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5ad327d616b1606135768c44d79c27cf SHA-1: cbaaac4e56172aa52dd27e5fe41356025fc08e9a SHA-256: e57a16782cad50db81f1769415055663e315b0c4fe02d2fa5a1d3c336323b3d1
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classification strongly flagged it as malicious. The presence of multiple compromised upload paths suggests a coordinated effort to host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/8611fe7139328bfb4a1323a3eff00120/66015444696.pdf In PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/44f7f48763c8f4fcf4477e383af96747/lisejuzadutewutuzaj.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/10897904109.pdfIn PDF document text
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/fowuf.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/14bb3d3251216c20e6b9707419ef91d7/92009668495.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085741880a3c---40888495261.pdfIn PDF document text
    • https://aashianarealty.com/file/32707665319.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bbb1e61b2---12893440798.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/bbfbfb0aac5402a9e98971044be75e1a/83601543077.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/84653029952.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/ba03623ef45f43717da862669271bf77/26055413906.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/91123078478.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/6265512169.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/8170138c90022ad1770b07ae0baf060e/fuvupimironobesu.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/vomanilodopas.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160ed059871975---90808422730.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/minuweriwodexe.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160722013ef3ab---genopifaz.pdfIn PDF document text
    • http://rockhouseschool.com/rockhouse/uploads/files/buripox.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/garepetizoreken.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/35cc8e7e03a9fcef35f47e21d6169821/62461208360.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a52e47108---1412344032.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/74957834257.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608327c4e1b30---64265992304.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b8699ce8272---70577738546.pdfIn PDF document text
    • https://taperagi.com/contents//files/86223919629.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/wativadigididadaj.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/mtbfh7i5kdguffhg7slj218g2q/46318690388.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=girl+on+the+train+2014PDF 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_off0000ead6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD6 18092 bytes
SHA-256: 0d801d87d1dc273e80205ecc0159a015347a8c8d2a5283191f4e5099562a4256
font_01_sfnt_off0001198e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198E 10448 bytes
SHA-256: 67bf6d681f23ad007e092e40646568b88e8e5a205deba0916c645976b2dbe3b6
font_02_sfnt_off00013142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13142 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.