Malicious PDF — malware analysis report

Static analysis result for SHA-256 118238c2eb195234…

MALICIOUS

PDF

85.4 KB Created: 2021-07-17 14:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a1d3edd9c3526f9d91524f90854d3ffc SHA-1: ee70e7dcd6e58cbc4dcdb4fcf2f6c51786131b85 SHA-256: 118238c2eb1952343e5452da054b98fd91fa5e3003da41d9c7a643a49a2e72bc
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to numerous compromised CMS upload locations and disposable hosting, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://adaviestransportltd.com/userfiles/file/nelemelemoj.pdf In PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/f3897ac191abc6d3af1945e3bbc04bd1/xudorevofejen.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/tenode.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbaf20ece7---929710133.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3b4301e6f---zolinap.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/galekabi.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/buvaxox.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/f6c60e9ada25a9db9310af7fe6e4c952/zelalofigenar.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/86f1c69a034167c63c674a80759a94a0/70756595287.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/43849616839.pdfIn PDF document text
    • http://archimax.ch/dynamic-images/cms/file/wumolepome.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa6978e550---16167920460.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/d62399430f16a7dde8ccd8c445fd340a/25224754878.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/xoxuwopo.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/jekijoxaj.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/97387551479.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/movixatowefemibelexule.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/cf27ad9c6316077ed04f19adfef1f36e/fivojimavomakofi.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/9917078296.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c2898ed8e7c---bonidegubadupezijilajudar.pdfIn PDF document text
    • http://xtra360.net/campannas/file/roruj.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/6e566d344be320b58a66bbe3a00d8ccf/pajituzebuso.pdfIn PDF document text
    • http://budaikepkeret.hu/uploads/file/66341111148.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c494fe39073---xadelew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=retail+distribution+meaningPDF 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_off0000ecc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DE 10876 bytes
SHA-256: 87de327d933d735f771cb2137da03e8b8e9201797c6c3fb08a99d0783397b705
font_02_sfnt_off00011db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB2 16456 bytes
SHA-256: fb39367461f821adf6306369c0ca3924f2bc193859a429a4bdb5f973bfac8df2