Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc363bd7f7e2af2f…

MALICIOUS

PDF

67.6 KB Created: 2021-10-01 06:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 2ba0bd24d14a16616b2ed06753e28d92 SHA-1: 3a41b07eeac14a680090ff56df88e7fcad931096 SHA-256: cc363bd7f7e2af2f2fa267e60eac1b13a63c9a0892521f5efa753577d70f1335
86 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by an ML classifier and exhibits characteristics of a phishing lure, including being image-heavy with a clickable action. It contains numerous embedded URLs, many of which are hosted on disposable domains, suggesting an attempt to distribute malicious content or redirect users to phishing sites. No scripts were extracted, but the presence of external URIs and the overall structure indicate a likely attempt to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 5

  • 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 67 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 https://philabc.ru/uplcv?utm_term=walking+dead+season+11 PDF link annotation
    • http://www.biharikft.hu/bihari-admin/ckfinder/userfiles/files/puvitenagipelef.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/831f67cd2692d019202d988dfdd80505/sixalotafalesaw.pdfIn PDF document text
    • https://liepasmuiza.lv/userfiles/library/vusam.pdfIn PDF document text
    • http://vhktn.at/images/content/files/43664463026.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/tigowixopazoso.pdfIn PDF document text
    • http://torby.kbo.pl/ckfinder/userfiles/files/29476766878.pdfIn PDF document text
    • https://snoman.mb.ca/ckfinder/userfiles/files/18367804457.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/nugejepujopumalob.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/163139930264.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/5524294120.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/rawekijanamas.pdfIn PDF document text
    • http://agro-norwa.pl/userfiles/file/23153739769.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/wivoraruribewelopow.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/pedulasobanusenomobapu.pdfIn PDF document text
    • https://borgopitti.it/userfiles/file/24882872294.pdfIn PDF document text
    • http://normel.org/files/upload/file/25106122135.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/21560452143.pdfIn PDF document text
    • https://schachverein-marchhoefe.ch/fcsr/news/upload/file/puxef.pdfIn PDF document text
    • https://promaxsuspension.com/csmimage/file/28056640240.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/6482865861.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/jaxopuzobajarade.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/vamajixepodum.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/zenowopexofalejatare.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/c86n3ta7l4u2ph6db8d41rrs54/76050157724.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_off0000ae47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE47 14308 bytes
SHA-256: a5a589de54e3af8d3e71fbd669aa97c83e3cc6080bdfa5223f3f1d35c7abf108
font_01_sfnt_off0000d1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F5 10364 bytes
SHA-256: 43d111e740be320040522707a8702c4e23487d6072de4bbb77630a42908e57ca
font_02_sfnt_off0000e949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE949 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1