Malicious PDF — malware analysis report

Static analysis result for SHA-256 cadbe62b66dbd6b4…

MALICIOUS

PDF

74.6 KB Created: 2021-09-09 17:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6b6fe4b6d1ac098a1c5c78798214112a SHA-1: 40f5888f141bddd1dfc8712f79dba3e65160039f SHA-256: cadbe62b66dbd6b47885ba3ee601386b10ceb33c382f67999734c2a7dbc42e17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various domains, many of which are hosted on compromised CMS upload storage. The primary purpose appears to be directing users to external resources, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1002b6a64---katezakabakijeduwuzixarup.pdf In PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613025b074c2c---93781350994.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/bamolinuzomerolozaxesun.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/99389189552.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/xobarexejolibi.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/28797789133.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/57078518256.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/bda2305c6f4b69f40a3d9851fb5297eb/pukipubesutekokibi.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/lejelewifugewofa.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/e3f56c40cd7e166a10c7059392176f40/40179228825.pdfIn PDF document text
    • https://piti.leaddeehub.com/userfiles/files/73424253633.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/zanaregifixerimos.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/71688723840.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/86520618524.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/geropatavani.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/nupazur.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/zewigasatexofogarared.pdfIn PDF document text
    • https://marosme.ro/hirek/file/somolofiwexu.pdfIn PDF document text
    • http://domingo.hu/ckfinder/userfiles/files/49820465159.pdfIn PDF document text
    • https://italvaping.com/file/8867130002.pdfIn PDF document text
    • https://mabuksusu2.com/contents/files/24000662268.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/vugiguf.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613104d577c93---naxim.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/zesijejivubamubo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=rally+rush+3+apkPDF link annotation
    • 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_off0000c19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC19F 10324 bytes
SHA-256: 76286eb2d9c5b0f6a21e5e616de345383a8970d3eec8c744490e387fe221770e
font_01_sfnt_off0000d91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF131 17168 bytes
SHA-256: 7668c14bea53bcbdd6f97330769ad1ad75a4940dd64e144c48857058d7933507

Open this report in the interactive analyzer, or submit your own file for analysis.