Malicious PDF — malware analysis report

Static analysis result for SHA-256 3099060ffa8ff547…

MALICIOUS

PDF

71.9 KB Created: 2021-09-28 15:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e602a8f03e205f48845d264e17ba6979 SHA-1: 4743d2e02ceeea55bee3dc6c4e63a8ddf56af1a2 SHA-256: 3099060ffa8ff547e754fb4ad6c291db330b803011bc8fdbb424825857798f09
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The primary goal appears to be user redirection for phishing or scam purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://wastran.ru/uplcv?utm_term=best+qr+and+barcode+scanner+app+for+android PDF link annotation
    • https://palet-school.com/files/files/46649345213.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614630f64402e---rakudetabe.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/sukozesoj.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/72030819747.pdfIn PDF document text
    • https://www.carnesvarejo.com.br/assets/ckfinder/core/connector/php/uploads/files/99981735735.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/31569894586.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/nekofiwawasojukenigugav.pdfIn PDF document text
    • http://longruiglass.com/ckfinder/userfiles/files/20210909_152004.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/belerifupimalibafen.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/56561804083.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/33587241390.pdfIn PDF document text
    • https://zlato-invest.cz/upload/files/27303541574.pdfIn PDF document text
    • http://maytinhnangdong.com/files/uploads/editor/files/zinejemexowilodumumujane.pdfIn PDF document text
    • http://protectakoteasia.com/ckfinder/userfiles/files/nolunusunadogasuremep.pdfIn PDF document text
    • http://z500.si/files/72649893350.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16136ac2ef0393---44613864321.pdfIn PDF document text
    • http://frutapac.es/ckfinder/userfiles/files/78344914177.pdfIn PDF document text
    • http://yuhao-tech.com/userfiles/file/xebuvijapix.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/pakulosusuzesiged.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b94f86eef---42882322452.pdfIn PDF document text
    • https://atlantidegattico.it/file/bimorog.pdfIn PDF document text
    • https://tinnituskozpont.hu/files/90248856827.pdfIn PDF document text
    • http://bordahusfeldolgozo.hu/editor_up/guveku.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_off0000b4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC7 10904 bytes
SHA-256: 277a25a3f318f7d36b3bb2a97873db79b27d2438d70c452161a254ee9fa17a3e
font_02_sfnt_off0000e5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BA 17264 bytes
SHA-256: 5e84a25cdff5236a536362f3542bc8f0c3304538819b9857577c7e248c23a77d