Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7452e4aa703c36d…

MALICIOUS

PDF

82.3 KB Created: 2021-09-03 04:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b69fe16933451fdf92a2b168bbcded23 SHA-1: 91229a1b0f7735e7fee54b1faf4974f3724d4fd4 SHA-256: d7452e4aa703c36da08677f4e0f33476672872e2ebf36bc97ddf02777bd8e2b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and the nature of the URLs indicate an attempt to exploit users through deceptive links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b51c76a2ffc---65149700552.pdf In PDF document text
    • http://bettaletroom.com/file_media/file_image/file/fojudikebulemopavu.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083a8810f82a---pizefipedi.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4299d7eda0---devujazurikazulaj.pdfIn PDF document text
    • http://goozzl.com/userfiles/files/dexekewigova.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/pumijirevuzinelevoladum.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/69815168716.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/41352657822.pdfIn PDF document text
    • https://airflow-skateboards.com/userfiles/files/23528765323.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/3cdd55725f49b191286eac20493aabba/fewamejerenuxev.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/66059095431.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/41486228924.pdfIn PDF document text
    • https://weishinclinic.com/uploads/files/202108231121147867.pdfIn PDF document text
    • http://cafehinglung.com/uploads/files/vofafururajofereridis.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/a4549491c8e51aa2cf27df491671a7cf/96058613103.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ee55d1763e5---89242314794.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/2tmbdqr1c6uu5j5d98atsf9kg4/zoxupagajeti.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/512dc32c0d4933a83aca610f60630533/fofudunivuzaposok.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/bc3bdd6c8ab81e43216f988ca837894c/62447071638.pdfIn PDF document text
    • https://whatshoulditcostme.com/userfiles/file/49322979080.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/nexekigunuzubix.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af65ece4aaf---55902948408.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/73473908639.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/61572516508.pdfIn PDF document text
    • http://fs-select.com/images/blog/file/25957699576.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=existentialism+and+human+emotions+sartre+pdfPDF 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_off0000dfbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBC 16324 bytes
SHA-256: fbe57153774e1307fbf6fc99665d2dcf1cf6da37f2e12485d4ecfc5ce259e306
font_01_sfnt_off000109dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F3 10948 bytes
SHA-256: 60ad833ccca9d4e3963e2c0a268ec544beca0db61c6d1fd15f835f7081cbba46

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