Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab10c9e746aaea01…

MALICIOUS

PDF

87.6 KB Created: 2021-07-31 06:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8cea5f7f47bee97ebfdaf82f9ff71ce0 SHA-1: b32b9a3dcd7c76f0acab839d66b8f48bfc9f5357 SHA-256: ab10c9e746aaea0139726249a03d06dc8093b6de37c2f71d244a30827d1e0f00
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, presenting numerous URLs that lead to potentially compromised websites, some hosted on WordPress upload directories. The primary purpose appears to be directing users to malicious content or further stages of an attack through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://driver-jazda.pl/upload/file/kirapazabotoruxop.pdf In PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/74a38efc88394d8056649193d78f1865/jibesesanijowetakaxaxenop.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/5911f94fb94aae76a6c25f49fec7c8de/70112215035.pdfIn PDF document text
    • http://novehorizonty.sk/userfiles/file/58159475311.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/tobodugigafisavakef.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/fa25eb23d1e2fb73e65aab45fe93077a/dodupotabafesibatipo.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/xononisubatujele.pdfIn PDF document text
    • http://wghsclassof69reunion.com/clients/b/b3/b33699c65747f61a54cd06c2fab73d22/File/dabub.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/5485a4bdd4c96f55feea026ddd1d4be9/32610979932.pdfIn PDF document text
    • http://bogema.by/content/Files/fumurizimadatirafiki.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/22240297425.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/ggadrvj8mid49717fslsliljh6/mevodofavofewixorobi.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16102b62eb488f---78132888567.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/a18496a49d211943aa8c176d2a3ce8b7/48746028550.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/ce04d7918a02e77bdcb24be51811597c/35943253594.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/1a65312ff2bf4c8a61d2e6d2af4e911e/5214398472.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/knjgqhr0q3g3b7qcj4dtjhumo3/nadujijoxawozajuwiweleb.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/5423458471.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/30821824247.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/16234171116.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/3a53886da6dcde0ef291c3ec6d19c415/16511894870.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160f0afb991858---genisefopenogosejasop.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/xutarakafer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=counter+strike+condition+zero+win+10PDF 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_off0000ef55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF55 10700 bytes
SHA-256: 5bd8b155e200c05d431f5655213d3021b203c8d347d259e34e820b9c35a8d486
font_01_sfnt_off00010833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10833 17968 bytes
SHA-256: 5ee033eea43dcac6bb8f697521b62ff04f25b7dec287f55b3fb91a1eb9590086
font_02_sfnt_off000136bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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