Malicious PDF — malware analysis report

Static analysis result for SHA-256 6060a7fc31b0e887…

MALICIOUS

PDF

85.3 KB Created: 2021-09-09 11:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9dcfb240a81925e82bf5b80e61bac706 SHA-1: 6bfe7ccd01270a44c47bb3dfe0d9658350abb107 SHA-256: 6060a7fc31b0e8878a93b1612a2289b09ae3f909509ecc52a8e42a7c7c9a5832
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous embedded URLs that point to external sites, suggesting it functions as a link farm. The presence of 'utm_term' in one URL indicates a potential phishing or malicious redirection scheme. While no scripts were explicitly extracted, the PDF structure and URL distribution strongly suggest a malicious intent to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://coretry.ru/uplcv?utm_term=icons+packs+for+android PDF link annotation
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613246147a393---66568819452.pdfIn PDF document text
    • http://phubozena.pl/userfiles/file/mukubapijilonularagim.pdfIn PDF document text
    • http://www.primariasantana.ro/uploads/file/faxeja.pdfIn PDF document text
    • http://getsolarnj.com/userfiles/file/jujafodes.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382d47d26a8---nolaxul.pdfIn PDF document text
    • https://parc-hotel.info/file/13739285288.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/94108637436.pdfIn PDF document text
    • https://bonekarusa.com/contents/files/94264295086.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/musovabulaguseso.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/surij.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/rvoa7086bjg3curmiepp4utggl/pujesibinap.pdfIn PDF document text
    • https://upaspor.com/resimler/files/58370812329.pdfIn PDF document text
    • http://pxmonastery.org/CKEdit/upload/files/tipuvi.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/59839273598.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/rufif.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/21559797499.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210903123322_mor45t.pdfIn PDF document text
    • https://xylemleads.com/userfiles/file/zajenoxajekolufupo.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/tutojuniw.pdfIn PDF document text
    • http://ersenergy.com/UserFiles/file/90592647127.pdfIn PDF document text
    • http://stylekd.ru/files/27545089726.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/japojozero.pdfIn PDF document text
    • 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_off0000e6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF5 10380 bytes
SHA-256: 99cefb2cd46f018d6430722c8f190c7c3d4e3892c48b95762fb451e05defb778
font_02_sfnt_off00011689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11689 18900 bytes
SHA-256: 8b03f900f0483a0995eb6eda2ec6a1440cec13c977a36534ab7bb3909774461c

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