Malicious PDF — malware analysis report

Static analysis result for SHA-256 076a05e1f80714cc…

MALICIOUS

PDF

76.3 KB Created: 2021-09-13 11:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f6d5789e8a82424da919a89e84321278 SHA-1: d5e8ccd2b55eacdaf8d486e7d557fd43ec13df11 SHA-256: 076a05e1f80714cc8b1d4f2231cad0d972ecca5a8b6c7ccbd892e07efe934dac
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially malicious domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting an attempt to obscure the true destination or spread malicious content across many sites. While no scripts were explicitly extracted, the nature of the embedded URLs and the ML detection strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://factorycontrolprojects.com/userfiles/file/13850942585.pdf In PDF document text
    • https://claudiodituri.it/uploads/xosagotivozuverozipisiviw.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/88819033704.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/5083938528.pdfIn PDF document text
    • http://mwbright.com/upload_fck/file/2021-9-1/20210901170903665753.pdfIn PDF document text
    • http://ecosdaliberdade.com/ckfinder/userfiles/files/fobipejanojowelafesotenib.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/xezumepejum.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161387c5997cf8---14453072520.pdfIn PDF document text
    • https://ddtoyz.com/ckfinder/userfiles/files/segiwid.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/davitapidujusumatabof.pdfIn PDF document text
    • https://photofetimages.com/13964061366.pdfIn PDF document text
    • https://orig-shop-gsm.ro/ckfinder/userfiles/files/96663490419.pdfIn PDF document text
    • https://zahrek.com/userfiles/file/tesaziketusirit.pdfIn PDF document text
    • http://agilesolutions.in/uploads/62834940809.pdfIn PDF document text
    • http://lifeisartfoundation.org/sites/default/files/images/userfiles/file/pavuzukikufemesuro.pdfIn PDF document text
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/18721683575.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210912235247.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/filerapapawu.pdfIn PDF document text
    • http://topspeed4wd.com/ckfinder/userfiles/files/xatafimofekora.pdfIn PDF document text
    • http://ruresept.ru/files/file/25365732220.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/doravatewekoterenujanolol.pdfIn PDF document text
    • http://naviway.su/upload/files/gamikedatub.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/42328965744.pdfIn PDF document text
    • http://furniture83.com/upload/files/sifopop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=red+wallpaper+4k+androidPDF 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_off0000c63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63E 10420 bytes
SHA-256: e80565caf9c75203068b876eb95ef8a23831528a29733f67c925b64e6a552343
font_01_sfnt_off0000ddff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF611 18048 bytes
SHA-256: 5bc6a50408ef987de7fe80dd05c8af92b97805cc80fcdec43fc24c27e60f9436