Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca7c806c6e1a7fd…

MALICIOUS

PDF

68.2 KB Created: 2021-09-26 01:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 902eb0986f34481724901fc413b63902 SHA-1: b1cd34e0d657a50a4c7c69308df7183d5acfa977 SHA-256: cca7c806c6e1a7fdc57a1fa79b2f01e4de542ac62bd88f080f29ff706bc88f62
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. It contains numerous embedded URLs, suggesting it is designed to redirect users to malicious sites. The 'PDF_IMAGE_LURE' heuristic indicates the document likely presents an image to trick users into interacting with a hidden link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://baaningdoi.com/file_media/file_image/file/juwenux.pdf In PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/5014622452.pdfIn PDF document text
    • http://zenobiacultura.it/userfiles/file///45698611816.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1614718e65e9b2---47501662114.pdfIn PDF document text
    • https://akgoz.zemta.com/uploads/files/14748957662.pdfIn PDF document text
    • http://venkateshservices.com/uploads/52593203458.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/rugebupuvoma.pdfIn PDF document text
    • http://uran-berlin.com/userfiles/file/91828952224.pdfIn PDF document text
    • https://mpksieradz.pl/upload/file/38893523127.pdfIn PDF document text
    • https://truckforceone.com/upload/editor/file/ragabojotijureterofif.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/venadimav.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///45187708755.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/tevegadariregifuluxoxigo.pdfIn PDF document text
    • http://iphysiology.ru/upload/nupavivufotojine.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/bejexizetivoxitubidu.pdfIn PDF document text
    • https://khyatiinfotech.biz/ckfinder/userfiles/files/gurawipuviribuweluz.pdfIn PDF document text
    • http://wgadget.com/file_media/file_image/file/92074840557.pdfIn PDF document text
    • http://cdenito.net/userfiles/file/28253957878.pdfIn PDF document text
    • http://efcosmetic.com/uploadfile/files/50708804115.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/36616155213.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+view+someone%27s+instagram+profile+picture+privatePDF link annotation
    • http://cluster006.ovh.net/~greeters/namur/ckfinder/userfiles/files/28987013700.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_off0000aa48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA48 11100 bytes
SHA-256: a3a3f5f8d08188fc6b5bfa8e66bb271ddde955a41cc4b2049887834cf8898b37
font_01_sfnt_off0000c444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC444 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dc56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC56 14576 bytes
SHA-256: 65e6f1704276fcd418d3f56f894f9e7a03c7986f6a52e41562f7d5aaecef2359

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