Malicious PDF — malware analysis report

Static analysis result for SHA-256 d237a544e3ddface…

MALICIOUS

PDF

74.1 KB Created: 2021-09-16 23:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 90e43a6a193bf9c1270ec44183938b14 SHA-1: 00038fc9ad08ac99ce4dcd5851c7da102520155d SHA-256: d237a544e3ddfaceb800c2f63e2b8cdd21d5fc889c486bf66c6080186482e70a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to disposable hosting domains and are disguised with UTM parameters suggesting a search query. This behavior, combined with ML and ClamAV detections, strongly indicates a phishing or malicious redirection attempt. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to lead the user to malicious content, likely a phishing page or a further malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://cructi.ru/uplcv?utm_term=sardaar+ji+full+movie+in+punjabi PDF link annotation
    • https://universitecentrale.net/uploads/FCK_files/file/kifipe.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/ludaxuwiberugutovo.pdfIn PDF document text
    • https://blv.by/upload/editor/files/6958827175.pdfIn PDF document text
    • http://ipceurope.com/assets/file/49496811548.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/kuroboguvilif.pdfIn PDF document text
    • http://www.sctiec.com/up_files/FCK/file/98152196843.pdfIn PDF document text
    • https://brillimet.com/uploads/files/202109032059072088.pdfIn PDF document text
    • http://www.slenderclub.cz/ckfinder/userfiles/files/10132591089.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/9bbde8cd3c21e7ec23219fc775275fea/68351537244.pdfIn PDF document text
    • http://kftchem.com/upload/files/57749705981.pdfIn PDF document text
    • http://klinok-saintp.ru/files/vewugibi.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/vunikezoxajewak.pdfIn PDF document text
    • https://garnizone.com/userfiles/file/40238553207.pdfIn PDF document text
    • http://npas.ru/pic/file/tedizogalokitibopetulaguj.pdfIn PDF document text
    • http://farashimirooz.com/files/fewomasusidefivi.pdfIn PDF document text
    • http://rexant.by/upload/editor/files/wogofepudadamu.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/67260163985.pdfIn PDF document text
    • https://windsbs.biz/files/file/xalit.pdfIn PDF document text
    • http://cnsgafgl.netsociality.com/upload/files/54650665618.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/wujaderabodazogafudejatu.pdfIn PDF document text
    • https://vivaldiroberto.com/img/files/mediafiles/file/76670347695.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/lifazako.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/gojegalidipabigarivejoxaz.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b573aeb3dc---14265423742.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_off0000bb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37E 10904 bytes
SHA-256: 12f7ff686a4d33f8af60cdfc3d20c673224cebf5c7759e35187e45b4c6442182
font_02_sfnt_off0000ec5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5E 17996 bytes
SHA-256: cd385f987a7d82c2341f028961d15a79ba598afce95769332c8e750c8afc871f

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