Malicious PDF — malware analysis report

Static analysis result for SHA-256 8767e2ce18a56136…

MALICIOUS

PDF

83.3 KB Created: 2021-09-11 06:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 8458b4a304055624a49926d924f4d8b1 SHA-1: a9d5a95e40bc106339183defdf11001313118e21 SHA-256: 8767e2ce18a561361ab861581831a4c5df6753a1f176b6052bbb4f86ca763f30
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smidgel.ru/uplcv?utm_term=temple+run+video+temple+run+video PDF link annotation
    • http://prime42.ru/userfiles/files/wikugevob.pdfIn PDF document text
    • http://gattoneva.pl/pages/userfiles/file/jozivanuwafivatigixujij.pdfIn PDF document text
    • http://train-in-japan.com/images/blog/file/gikonilupinitajobexud.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/46936308739.pdfIn PDF document text
    • http://www.farmaciabergua.com/userfiles/files/94874456171.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/lesodefesusute.pdfIn PDF document text
    • http://kozlovka.mebel18.com/uploads/files/vuwapuxixotaruzimasarodo.pdfIn PDF document text
    • https://998.geektic.com/geektic/files/simobuzawamanikurep.pdfIn PDF document text
    • https://philly.drinkpoint.com/uploads/files/73086934472.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/64246501653.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/6120870097.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/22659409554.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/18793687166.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a155b2c4ac---vopevobowovemito.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/50541031804.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/6592775095.pdfIn PDF document text
    • http://krakowska98.com/zdjecia/fck/file/lejesixe.pdfIn PDF document text
    • http://se-ty.com/uploads/userfiles/file/16641737029.pdfIn PDF document text
    • https://cpsguffanti.it/uploads/file/tolapinudimosutuk.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613bfed2e087f---dopalilefuxene.pdfIn PDF document text
    • https://webdatedepot.com/userfiles/file/gevozodepipironomalizimaf.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/xelali.pdfIn PDF document text
    • http://metzlerranch.com/userimages/83704463638.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/vafuputusapelugaxi.pdfIn PDF document text
    • http://gruppocaminiti.it/userfiles/files/zidadazaso.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_off0000e026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE026 18436 bytes
SHA-256: 5af93ad78e8fd06228e7206864ee81c7528c29912a240b1aabe216f938bac161
font_01_sfnt_off00010fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FF 10352 bytes
SHA-256: 994c902d08dfefb165517251ba8bd11890915e30ecbbea3c2b39f376167106a9