Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d0a9d7dd5f0012…

MALICIOUS

PDF

84.2 KB Created: 2021-09-05 07:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 14df10407d03e17784c2251045ce9351 SHA-1: d2837f4a6c078358d17aee240f02292c0f9b96d4 SHA-256: 47d0a9d7dd5f00121f2c84d18e0e2c2b0fcc1fa05a7e1dd767b5a13b2c1baed7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm or phishing lure. The embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/pdnov4liirjcdpftgl221i98m2/vupupoxedapirinov.pdf In PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/xukoburig.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609dadd1e4c86---mokuwunudoneluw.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/tapafasipezana.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/78762861302.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e66f852b534---tojubexawapizarugawak.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/danizaxewekumo.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/nnr7or6m6cc75jsdi124405pft/59255055179.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/10576066730.pdfIn PDF document text
    • http://rsst77.ru/upload/files/seziraxidisonuguk.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/a60d8234a7bd66c416f07b67c2cc4d9d/digolevasubavewefu.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b288ca9980---teluridakigolivu.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd8b019f11---zorisoluwo.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed3da28607---8053194502.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cecb616e31---gikujinegepusepisita.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/zopigogabewiba.pdfIn PDF document text
    • https://pharmalogindia.in/ckfinder/userfiles/files/neber.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddecc100af---2038609794.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/25531564920.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/5e956ec74e7728641a2d476bd18aa2be/42447334765.pdfIn PDF document text
    • http://hkt-optics.com/hkt/images/userfiles/file/vubuleravejot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=the+economy+of+ireland+13th+edition+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_off0000e4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EB 17152 bytes
SHA-256: fd51791048597de5d1ee1612a846a5769f2e9aa699a0e9a6bf4694a9fa5c68c5
font_01_sfnt_off000111a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A2 11020 bytes
SHA-256: b508a5ca7c23ddef2024db284f03720253864a6fc7a6ab54ba8fdac79cf8e196
font_02_sfnt_off00012b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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