Malicious PDF — malware analysis report

Static analysis result for SHA-256 3609d3ad2c1814ae…

MALICIOUS

PDF

85.6 KB Created: 2021-09-03 04:35:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d838a8e8648c28d61962c34b68e18d89 SHA-1: 305c7207f45d4eeba94c30211dbd96edecef2c7c SHA-256: 3609d3ad2c1814aecfa94cfb345ca16ec495dbfef13ef30027674cd034e33684
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864718c8e4a---8175049087.pdf In PDF document text
    • https://ienter.bg/files/dodenorikozetawufimutim.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/pugiwagobedud.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/mirafuwujepo.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/71026554745.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/65939122315.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/edd6fc67104b6d2ddd3703b6db849a3c/tamugegomivaxunasiv.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/r3v1qpb7q2n8v7o9n5hhs1uvfm/58228710641.pdfIn PDF document text
    • http://texmet.pl/userimages/file/wutuzopeji.pdfIn PDF document text
    • https://www.uflo.edu.ar/ckfinder/archivos/documentos/vadebopiref.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607429ccb42db---29703716143.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/bijulakitizowunudewane.pdfIn PDF document text
    • https://vayoto.vn/userfiles/file/7676000879.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74e9941da7---90070643360.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee50842bdd3---bofiduzokipulafukaz.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/samubenanuxakilaf.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16081593ce233a---69402612024.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/labefamimokixewobilofig.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/voriduj.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/4f60546132d61363cf11452e78cf799d/82930383746.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c154e6070---47018984310.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609dad5938dd7---soxopodopeli.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/bunidiwob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=krups+beertender+user+manualPDF 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_off0000e9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CF 18836 bytes
SHA-256: 9bf9d3c33238a0ceda1c2a8563bf4941a6b662e3050b853a3a3dd18659b0b2a3
font_01_sfnt_off000119df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DF 10572 bytes
SHA-256: a18350c066037906c15818324bd8cd0e0921e47354832be9c169d9e58a2f0f52
font_02_sfnt_off000131c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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