Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad325d254b98fcb1…

MALICIOUS

PDF

82.9 KB Created: 2021-09-21 13:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0f39098cf2dc22144679c834758b9095 SHA-1: 9718da9dc72da869b576918ca92e2f73e6188a62 SHA-256: ad325d254b98fcb1fa9037be8c707492ce0ff43bf7cc1799a515fc26431b6d35
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with many pointing to suspicious domains and file paths, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content, likely via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d2c5d62a9---difijigawenakitote.pdf In PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614715be3dfd5---wokawuwunitasonuzufasevik.pdfIn PDF document text
    • http://studiotecnicoforace.eu/userfiles/files/wosikos.pdfIn PDF document text
    • http://warehousetraining.ie/images/xonitusowakasimepiz.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/fewipalanimoralugobabavi.pdfIn PDF document text
    • https://ontech.vn/images/ckeditor/files/2750385417.pdfIn PDF document text
    • https://ms01bet.com/contents/files/mikexobe.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/75101074952.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/42647161003.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/rusowewelisirolulus.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/38214143262.pdfIn PDF document text
    • https://ozora.schaffsen.com/contents/file/61604887462.pdfIn PDF document text
    • http://fratellibeninca.com/images/file/65686251360.pdfIn PDF document text
    • http://vietdubai.com/userfiles/file/52544505197.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/sadaxobugupezemuruvited.pdfIn PDF document text
    • https://pro-biomed.com/admin/userfiles/file/4454804659.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/gegupelod.pdfIn PDF document text
    • http://flexa.cz/docs/file/kugafujevejimijesi.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/62610851405.pdfIn PDF document text
    • http://www.tecnologycenter.com/admin/uploaded/fck/file/51646672880.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/bijebijapigi.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/kebewume.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/mumuzumifoxunurej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=song+of+the+hummingbird+pdfPDF 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_off0000ded5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED5 17792 bytes
SHA-256: 28fbfdf86ed3568d96ee4a22251661d39c7573bd0f5067364f59a954d260b95b
font_01_sfnt_off00010d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001255a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255A 10884 bytes
SHA-256: c89d242a8c699985c5ef6b047c3e2703e447fd815f6d210e3f5e63305a7290b8

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