Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c7d3d6e5abb7bc…

MALICIOUS

PDF

73.5 KB Created: 2021-06-30 06:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2c929defef34111c8142fa9c3afd2e8f SHA-1: b9681e82eedbb401e8f6de4066f46e47b93282f4 SHA-256: 02c7d3d6e5abb7bc96186954a5d0376f14282a3dc0507e600a324f189632738f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm to distribute phishing content or malware. The presence of external URI indicators and link farm heuristics confirms its role in directing users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://laborke.ru/uplcv?utm_term=quinhydrone+electrode+is+an+example+of
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf0888d957---65770850233.pdf
    • https://gamaconsultores.cl/upload/file/maneluwokasemef.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b5ab0ae6a---zesezade.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608562a55ff85---gobinoripojuva.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ujbad2698pd6jkbfos9489d7n4/kopavazodejulisusaj.pdf
    • https://dolmalatrek.com/userfiles/file/54924767567.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cff22b97739---vugoruxorateburavufirusam.pdf
    • https://www.alapan.org/fckimages/file/56937441792.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606d981022114---11916551568.pdf
    • https://doktor-ara.com/userfiles/files/pegomiroxefebubaxab.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094cf3e42195---92961753044.pdf
    • http://nakajima-ya.com/upload/save_image/files/40430677608.pdf
    • https://lapalettedesarts.fr/gestion/file/xosuw.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/b18953786c195b74fed8168b45ba32a0/zopamotiwawetadowodepimad.pdf
    • http://bishnutoursandtravels.in/userfiles/file/91940708977.pdf
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/020d392fe1c50c99ce536bea3f07ed59/sakoxepifalu.pdf
    • https://ivanamihic.com//files/rubewalujidepamilesiv.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1c0229fcd---dovagufofagodujepam.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d35844a6160---84313546049.pdf
    • https://groupunsur1.com/contents//files/jisaxanunagadozopi.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e14666712---vibopiwaxizuteniruxami.pdf
    • https://fontaine-eva.fr/userfiles/files/92762973136.pdf
    • http://arniestribu.com/campannas/file/mimitefenawafiw.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d027c698cf3---81223512435.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/fcc96d380664a151f7743d7449888ee1/88252743383.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba80.bin
5817004e9ca04f7daecd0b7cf23700692edce9e8342747b02bee15dc8a742fc5
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA80 11260 bytes
font_01_sfnt_off0000d4d1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D1 16792 bytes
font_02_sfnt_off0000ece3.bin
5feb1fc90242c7ff87c1e8e0a4a7edbde10f895d0df5689ecb7a1a646cf630d4
pdf-font-stream PDF embedded font (sfnt) at offset 0xECE3 16744 bytes