Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ce9457c1c902ac…

MALICIOUS

PDF

1.16 MB Created: 2021-06-11 10:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 26ae9ef7775c6b0972cb10d394d3fbd5 SHA-1: 00e4d1d7263bac5563f1dd9a241e97914f722570 SHA-256: 94ce9457c1c902ac68ffa7f2efabc642b4cb04a2a2cfd748ae57e692a1c6ebe4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF document exhibits characteristics of a phishing lure, specifically by impersonating a remote support tool to trick users into downloading a password-protected archive. The presence of multiple URLs pointing to compromised WordPress sites suggests an attempt to host and distribute malicious files. The ClamAV detection further confirms its malicious nature, likely as a trojan downloader.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4538

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.
  • PDF paints image(s) but contains no text operators medium PDF_IMAGE_ONLY_LURE
    PDF has 1 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
  • 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://crysiq.ru/uplcv?utm_term=armed+heist+apk+mod PDF link annotation
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbcaf91b19---wuwajaxewutejewoze.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/68a39456ef3baf9aa715f2266b123aa0/gikelisisibudatubopukaxem.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5da8a1c85---52753226112.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b487f07071c---37131709995.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1211d27028---dewojuserufijut.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/2326f7d9f922b73220a8bf07a61c3240/jolexo.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/54ktnf2dc4a64gfece1gv8g94b/veragaxumapamak.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/3340775325.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d26ea9b92---52356391254.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16072a009b0920---kubafimivotuvakod.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/cd395b1a0cf14af4896d0adce79124cd/vusezonojupisakenugutafug.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609332e1d31d0---48604655417.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/ginerisikisonu.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/1n58lrmkk028i3v059epvt93ki/46571719623.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210606_015820.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_off00124063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124063 5220 bytes
SHA-256: 16d2a87e9c83a962d08f247517b884b66e01cc75f819776d76db440b2334a928
font_01_sfnt_off001251ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251FF 11604 bytes
SHA-256: a6238ae1043a8404be106d0cbf5c5e56b447b2b7658c341e361253b777006ddb

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