Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c4f73ed5a85004…

MALICIOUS

PDF

62.3 KB Created: 2021-09-26 15:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d2414e2c56a9b79e29c71ade578376e6 SHA-1: 320e24bdd6963454c0eadc3b78372e7be932402d SHA-256: 54c4f73ed5a85004166736313d22fa796e8a5551bf14b09b4db2841c125443be
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, indicating a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7942

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://catamma.ru/uplcv?utm_term=where+do+i+find+updates+for+my+phone PDF link annotation
    • http://gardenofsound.com/userfiles/files/22308457999.pdfIn PDF document text
    • http://daechienglishpark.com/ckfinder/userfiles/files/dudoneluwanunanipemilek.pdfIn PDF document text
    • http://xn--b1adbbbaeqjtsflbfms0e.xn--p1ai/pict/file/wuxaza.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/wirano.pdfIn PDF document text
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/gidodoxajepopere.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/3796a99fb0bf1140fefa72de7533df80/witexetapomujis.pdfIn PDF document text
    • http://reichspfarrer.sk/file/12776628342.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/nelepopitilofexojurawov.pdfIn PDF document text
    • https://phnews.ro/files/file/99197867852.pdfIn PDF document text
    • http://qazaqbanki.kz/data/content/files/xifodivax.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/dilumasudapolalimujemag.pdfIn PDF document text
    • https://iwistw.com/upload/files/71953011427.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145ef855d3ba---kozeruge.pdfIn PDF document text
    • http://solo-reisen.com/media/images/file/66318144998.pdfIn PDF document text
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/62147670626.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/70288744606.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/60498166127.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/litasu.pdfIn PDF document text
    • http://rafaelokazakov.com/file/lawixoguwibaxotegunelotul.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/zaxoperibediwufokepexir.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/file/59870860363.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/vaxugemebodobojul.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_off0000b856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB856 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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