Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b6e0dd9f0317bc…

MALICIOUS

PDF

87.7 KB Created: 2021-09-18 02:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2de12348fd3b4e11579fa7853ce5af6e SHA-1: f02072629d5583051a01bb36cca2dac819910cd2 SHA-256: 27b6e0dd9f0317bc8a216675dc0253ad28d2db5c80e7ca4201d8d06ee79d4b2b
196 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content likely prompts the user to install a browser extension or update, a common social engineering tactic. While no scripts were directly extracted, the presence of numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggests a distribution mechanism for further malicious content. The document's structure and embedded links align with phishing and malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://vegastel.eu/components/com_mijoshop/opencart/image/data/files/kodewasozomuxabepo.pdf In PDF document text
    • http://chetaomaynganhnhua.com/uploads/files/65997986338.pdfIn PDF document text
    • https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/66054223535.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141e8679245a---kosanuverazunekop.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372d2e61ae2---zefepevejibelajivopejep.pdfIn PDF document text
    • http://goldia.cz/data/file/gumujopotulekikabafoxu.pdfIn PDF document text
    • https://x-software.cz/data/file/49362321807.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/kopifafej.pdfIn PDF document text
    • https://rajaunited.com/contents/files/miserikusojafisaleju.pdfIn PDF document text
    • http://balone.net/_upload/file///47009395934.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9cb1d7618---85607250453.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/13612309673.pdfIn PDF document text
    • https://penzion-pod-rozhlednou.cz/img/file/90651663768.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/23093661806.pdfIn PDF document text
    • https://seedcambodia.org/htdocs/cljr/data/files/68570347121.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/9c1dc03429dc7f2e1e052806a402606c/ferizefu.pdfIn PDF document text
    • http://embody.box8websites.com/ckfinder/userfiles/files/97331739381.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/5439774423.pdfIn PDF document text
    • http://forumts.com/ckfinder/userfiles/files/92696012928.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/pudonekuwor.pdfIn PDF document text
    • https://atlantidegattico.it/file/sujovobebowenufobe.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/2aa87e50a8becb249f2ba497e50c49d6/71725536772.pdfIn PDF document text
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210912140329.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/71919194259.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=ktm+movies+2020+bollywoodPDF 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_off0000f1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E5 10680 bytes
SHA-256: 5edf495fdde94a3aaeaf2a491cae461eaa6fafb4a50436443bd29af89526f09a
font_02_sfnt_off00012281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12281 18084 bytes
SHA-256: e342bc7081eb852cd4275fd14374b6248b2d918a8f45b941ad417c72dd425dfe

Open this report in the interactive analyzer, or submit your own file for analysis.