Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d20154312009c8…

MALICIOUS

PDF

85.5 KB Created: 2021-09-02 06:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 715a3f5f8c65a744ac87dfecd3370b14 SHA-1: 4637490510cc12e6039a302c28edd83cba395d61 SHA-256: 60d20154312009c811969a5dadef1e9784df53b30ea3658c98f75e76889cf1b6
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many of which point to websites that appear to be link farms hosted on compromised CMS platforms. These links likely serve to redirect users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bon-mar.com/fck_user_files/file/norivadogarerofovuken.pdf In PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160961eaa1af7d---rikusitukavebabudubekoso.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/dd3daf4b761f886ebc825d2e6345ebf1/70241449805.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/goxanuguf.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/05c0584d505a5f19b6f10ccf31ffd091/namanajavo.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/000edb25940749f6ede34cabad5555ce/kokunurotunavitoparifosax.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/ca7947b825df87e077fbe09cd78bc751/59581797742.pdfIn PDF document text
    • http://waukeganeast1980.com/clients/877304/File/nazonaxapalegikadejujola.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c88224afea9---21118826148.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/4965259945.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/84546460666.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/2794342199.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/08d6d059d323635377cb8364133dd4dd/92985559056.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/32448591526.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/2609f6515051c101242e871429227dfb/rotuzamomiji.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/a45bd6c4f695fb567af099a38ed7171e/20112357091.pdfIn PDF document text
    • http://e-hematologica.pl/users//file/gosedejepekoxelis.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/42348838792.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e430408aa60---gupabofivejozowotefo.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/benipowipubovufez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=5+lines+short+stories+with+moral+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_off0000e83d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83D 10888 bytes
SHA-256: 92d9ce07476fbc4d3edbaf73196f7f6f91be1c6c95ee44750296f93c3d4d58b8
font_01_sfnt_off00010140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10140 18196 bytes
SHA-256: f1c0e930cfa54817943a7b99a78caf49a1245f495e0a6b77fc68d5ebcbe712d4
font_02_sfnt_off00012fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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