Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3ca0eb4a8a7ac6…

MALICIOUS

PDF

69.2 KB Created: 2021-06-20 22:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 03ae177502ce8368ccb646065cd247c2 SHA-1: 9bdf84b46eabb894af45c71a68b87698d5354c10 SHA-256: 2e3ca0eb4a8a7ac6b260a520abeaed6ab55930e4fc44c77b0fcc192587b5a34f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs that point to other PDF files or compromised websites. The embedded URLs suggest an attempt to lure users into downloading further malicious content or visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://krisoc.ru/uplcv?utm_term=rules+of+thumb+for+chemical+engineers+6th+edition+pdf PDF link annotation
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160971444a2e3c---jejogulo.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file/%5C/2021052410420736.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/simavetu.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/39011188821.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/577805c6689b87bd65538b5bc601d18b/deseda.pdfIn PDF document text
    • https://etimes.mn/uploads/files/34128416185.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/9dcd82339c8d5472315746a4e449acc8/23112557759.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/rezijunuretoz.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/90039873272.pdfIn PDF document text
    • http://manixcnc.com/ckupload/files/durumijosorovuvagaledag.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079179de98fa---sutipijawetu.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/a35ecbd47fe428074db12d321e06b47b/16234253482.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/6979e70ae03e3538156761484919aa2a/lunotofobumaz.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/8gtp0vsubd1ptr9hga5bl6advn/48811640108.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/9b7563ff14fb87a181a15bbdd0c6c299/lewaxi.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/kijokuj.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859d5c4d673---vadoritatevizogunuvazitiz.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/039mdnsnfv826bt42r2nhm7set/62751345644.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00E 5868 bytes
SHA-256: d6943a4478e1539181cc508a67f569fd67590f00d1af7de7e4b4c6f2a6d540f8
font_01_sfnt_off0000e3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E3 10288 bytes
SHA-256: a08bf7dec2f1b96477e7efaa43234dd87702c706fb762cd81df8d0b832451912