Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e54ed7cc0044628…

MALICIOUS

PDF

77.6 KB Created: 2021-09-16 01:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 06aec68cf3b6ea6a6aa540b026c15745 SHA-1: 869a21f19e8ade6b03d0eac459cbd0093e90f00c SHA-256: 4e54ed7cc004462839482422a088bc7235c78af4573f612e9a7b92a7bfbb88ea
124 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7562

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=band+vaaje+full+movie+hd PDF link annotation
    • https://distriparkbotlek.nl/userfiles/files/lukafubojarifozolivojem.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/xomegepaf.pdfIn PDF document text
    • https://phu-komplex.pl/pliki/file/58323559282.pdfIn PDF document text
    • https://campermagazine.tv/public/file/soturedowapojexomosonef.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/12764938288.pdfIn PDF document text
    • http://ageddfjtj.pretty-match.com/upload/files/nujadipuzimawedafexatilam.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/28429119269.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1631079189.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/gotawuwikexajip.pdfIn PDF document text
    • http://micruts.org/userfiles/file/21020059448.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/zabivakim.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/7d2938a4985785342cdf3539e9da654b/35824627465.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/resarilefijuxevaxonaku.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/zadilodolixiba.pdfIn PDF document text
    • http://leprofit.ee/cmsfile/contentfiles/15321208241.pdfIn PDF document text
    • http://minhphucvietnam.com/uploads/userfiles/file/megubobizukidobe.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161388e918fe94---72465527246.pdfIn PDF document text
    • http://novena99.com/uploads/files/202109112156408075.pdfIn PDF document text
    • http://cleanking.net/userData/board/file/dawubigetixavavilivatuj.pdfIn PDF document text
    • https://ms02bet.net/contents/files/76929972074.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/zanakifabunakol.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/53389949963.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/50501450415.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF4 10604 bytes
SHA-256: f0c4aac554ec60640b804a5d30ac0ce433563476538f26216c7203023824254f
font_01_sfnt_off0000f7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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