Malicious PDF — malware analysis report

Static analysis result for SHA-256 932647fba4d1470d…

MALICIOUS

PDF

67.8 KB Created: 2021-09-13 21:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c289ce1df1ea3d043a6872ee20168c9e SHA-1: fa22533972c4de896fedaf4f8bbf16a18138680a SHA-256: 932647fba4d1470d4c06b95790a46dc29a00fe1ad4b709b425d261dc4b6fd837
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9130

Heuristics 4

  • 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
  • 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://smidgel.ru/uplcv?utm_term=episode+apk+iphone PDF link annotation
    • http://status.cz/UserFiles/File/vozafan.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/2567443947.pdfIn PDF document text
    • http://jindi2010.com/uploadfile/files/70008702151.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/miborukivowo.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/77974869240.pdfIn PDF document text
    • http://cloverdiamond.com/file/47256400035.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/13459295199.pdfIn PDF document text
    • http://bretagne.annuaire-regional.com/ckfinder/userfiles/files/17923997014.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/mikikuruparemex.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/ziwowojojiwiloxapasemopo.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109042259401344.pdfIn PDF document text
    • http://centromp.it/userfiles/files/98882401584.pdfIn PDF document text
    • http://fpole.ru/sadm_files/visapo.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/warapeguzibilasoz.pdfIn PDF document text
    • https://www.hsbofmn.com/ckfinder/userfiles/files/70554247567.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/libarisufumudo.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/didefatasusikojunolu.pdfIn PDF document text
    • https://biharlokmanch.org/userfiles/file/zexozepudujojufava.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f3f5d162c---tetajizepajutadejoven.pdfIn PDF document text
    • https://webmenuplus.com/images/file/82699424281.pdfIn PDF document text
    • http://theffirm.com/userfiles/file/26486535696.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/nerawof.pdfIn PDF document text
    • http://thaimassageboy.com/ckfinder/userfiles/files/fiwaxure.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161345b1e63d00---21837507338.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34A 10320 bytes
SHA-256: 807b920749bf8ff686ae92f2fa2618a435f641d472eafb325a9f5354f48c36f1

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