Malicious PDF — malware analysis report

Static analysis result for SHA-256 162e9fb69330a051…

MALICIOUS

PDF

85.9 KB Created: 2021-09-15 10:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 926832be62c8faf68b50da5b1412824a SHA-1: 7261934072acb59e7727769eb640ce3a7fc895b5 SHA-256: 162e9fb69330a051e4e37481508eb36709071424e2c7ba4b5caa98c84842f1b0
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. It contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to distribute malicious content or phish users. The presence of external URIs and the overall structure suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://garglob.ru/uplcv?utm_term=naruto+senki+ultimate+shinobi+flame+3 PDF link annotation
    • http://chhattisgarhsanskritboard.in/sharpinstitute/images/files/5143239161.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/xakuzizaxigewufa.pdfIn PDF document text
    • http://xn--2osv9pt2jfpt.com/uploadfiles/files/zazemofozamitibofimu.pdfIn PDF document text
    • http://kesifveotesi.com/files/biwowojukulotato.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/14841050241.pdfIn PDF document text
    • https://bda.ch/ckfinder/userfiles/files/nizopalibovogimuwupalil.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/5fb274c1c461fa00502d6fa5c6f599aa/13936123520.pdfIn PDF document text
    • http://vongtaygiay.net/media/ftp/file/togokuzokoguwogufigod.pdfIn PDF document text
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/jegunupefewolaxiwulokepug.pdfIn PDF document text
    • http://odra.cycling-recycling.eu/imgturysta/files/48291831546.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/51156623778.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/wovefibigomudesanexobe.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/28596486121.pdfIn PDF document text
    • http://feldbach-tourismus.at/files/funufafuzupibimugifom.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/41065619042.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/72811986314.pdfIn PDF document text
    • https://alstar.uz/images/shared/file/nanagezudof.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/50217105392.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/14069937488.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/nopagepo.pdfIn PDF document text
    • https://atputasbaze.lv/images/userfiles/files/2229311681.pdfIn PDF document text
    • http://suspensionestg.mx/userfiles/file/puwajowixodipekekabopexa.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/nejexefowanuzudotul.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133342ba1eac---gipixekotusalolafigis.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_off0000e50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50B 19864 bytes
SHA-256: c8c74dde4b126e51f4c5e796cd532c0c11707fb604fb880f0bf6045374c7a9a1
font_01_sfnt_off000118bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D4 10960 bytes
SHA-256: 8f2b3b10ee92e870be35b13de4205acef5579a6b10f869b8a5e35e924252d498