Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aae7ffed95d144a…

MALICIOUS

PDF

84.0 KB Created: 2021-10-04 02:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e083d6d13654aff7f82b05ad79a724aa SHA-1: 66254416041c79a2f4567b1cce7d3b47cccd9cca SHA-256: 9aae7ffed95d144a4e51d8d3a8f79745af448eb52f7515592617d0a3d002a31c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to disposable domains, suggesting a phishing or spam campaign. While no scripts were directly extracted, the nature of the heuristics and the presence of many unknown URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ascii.tn/web/cgi/file/5111941686.pdf In PDF document text
    • https://oancora.com/ckfinder/files/pevugozu.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/49256883656.pdfIn PDF document text
    • http://agrion.org/upload/fichier/75722468859.pdfIn PDF document text
    • https://cristalensi.com/public/File/90336601366.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/betezilano.pdfIn PDF document text
    • http://uktohabbarijamalta.com/files/file/vuzerelinetolo.pdfIn PDF document text
    • http://halongwave.com/userfiles/file/warejuwosumiguda.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/sumomegamavev.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/diwozorusovemugivewafota.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/50452531748.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/o29vad0l1jkks0mov8aka4s1rk/rugalofiwexesulibenajed.pdfIn PDF document text
    • http://celeb.huh.hu/UserFiles/File/gopepunolosuzuj.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/givefokov.pdfIn PDF document text
    • http://keyday.ru/files/files/xesefosuripubewux.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614970d18f8a5---77397308062.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/jibefovagesoma.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/73573373167.pdfIn PDF document text
    • https://lacausedeslivres.com/userfiles/file/jitena.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/36842328135.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/44164487966.pdfIn PDF document text
    • http://abwingscolley.com/uploads/files/sodazixijom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=new+amsterdam+couchtunerPDF 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_off0000d7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D0 21832 bytes
SHA-256: c9e9b36918d6b78c55b87140f1ebaaf596a09880a62ea93d42cb1ecf639c573d
font_01_sfnt_off000110f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F4 10660 bytes
SHA-256: a4b646cf0e211d3e73c3602a29f00a6b3ea0abab65d955d8820da2a81b4b6d43
font_02_sfnt_off00012949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12949 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.