Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46652371d9df0cd…

MALICIOUS

PDF

78.9 KB Created: 2021-09-09 18:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5c2530ee4d43d3bac533dde407cf4899 SHA-1: e6b36dc2930ee367e646d390e0f4b7b4336580d6 SHA-256: c46652371d9df0cd979956323d9f91ab8c63c57020e0d5a71a32a9b2b89bdf26
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and one specifically uses a 'free movies' lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://allytemp.ru/uplcv?utm_term=123+free+movies+old+site PDF link annotation
    • http://kenhuffbuilders.com/userfiles/file/51924601171.pdfIn PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/pebinomutuz.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/vawuwelakaxobewibegameg.pdfIn PDF document text
    • https://mmrh.myagenda.cz/pictures/editor/files/93581659546.pdfIn PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/jiligoj.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/25925812066.pdfIn PDF document text
    • https://vnnc.vn/img-hdmedia/files/67743144465.pdfIn PDF document text
    • http://insuralead.com/userfiles/file/kipikike.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/rebaj.pdfIn PDF document text
    • http://aaas.handyfriendship.com/upload/files/nivajokofijobifubod.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/161301be1d0de2---sefowivujilazitafu.pdfIn PDF document text
    • https://hse.tw/upload/file/28369194393.pdfIn PDF document text
    • http://strandedtattoo.info/file/wogofifaz.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/turazeju.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/p6q5ruo8fstjvbnrlrblkbhrmr/melijaxuwefipomurerigaxel.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/63974615612.pdfIn PDF document text
    • http://sirinthepgroup.com/userfiles/file/kelifimodemalafajitixane.pdfIn PDF document text
    • http://hueide.com/upload/files/kisalofi.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/21977694872.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/98930541288.pdfIn PDF document text
    • http://pro.ovh.net/~tribuene/images/banque/file/dejiguwamevugigok.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_off0000d346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD346 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB58 16784 bytes
SHA-256: de38bf8cfd1edc30fa975a47f0fd567306e19675cb30398fcb7df98890e42116
font_02_sfnt_off00011664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11664 10564 bytes
SHA-256: ae0f81c70243e61b3d32c052ddcf03c2be2d19f5d73001eca3530126fde0e5e0

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