Malicious PDF — malware analysis report

Static analysis result for SHA-256 4452001b3d0502e8…

MALICIOUS

PDF

73.7 KB Created: 2021-09-11 22:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9f57b55f626700044bf1014b393c614f SHA-1: e1ddce7e11c6d0b48082812f300daca8b254fa4c SHA-256: 4452001b3d0502e86c37b18a27fd461e2647ed8fb43e0c7db8c92465508b254e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing a secondary payload. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://cructi.ru/uplcv?utm_term=download+ebook+tere+liye PDF link annotation
    • https://sofupingame.com/calisma2/files/uploads/peluxivi.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/wosid.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/gotuvozebor.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/rcfb7a97e3oguhp9ngrm7v5ebf/bupitis.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/43326007571.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/91817206990.pdfIn PDF document text
    • http://houtackers.nl/userfiles/file/86828602066.pdfIn PDF document text
    • https://dnsbp.com/all4help/fckuserfiles/file/19277082545.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210911_5606C665B4C8FFF1.pdfIn PDF document text
    • http://sten.kr/club/data/userfiles/file/20210903213221.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/demuv.pdfIn PDF document text
    • http://matraholding.hu/images/userfiles/files/4550720557.pdfIn PDF document text
    • http://brlairport.com/images/file/75850083066.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16137afe8c4513---furadizudilidotebil.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/0kr7r6l9dct46b16rprbeuco6l/98418662511.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/20625664146.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/501031882df85cd1471dd23f591c1862/31714868233.pdfIn PDF document text
    • http://www.cbs-emballages.com/upload/file/telaxubedevarenozenevuguj.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613c647e2aa19---pimevunusojepukolav.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/56090698438.pdfIn PDF document text
    • http://heatherjansch.com/ckfinder/userfiles/files/fawasagozabegu.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393e9622352---86497237313.pdfIn PDF document text
    • https://eksiliotomotiv.com/upload/ckfinder/files/31145313291.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_off0000bef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF2 10508 bytes
SHA-256: bcf00ffc1c8e5dc6bc4de76c59c2d28e65d7dc90e5e69cd7d6aad271d7c1d711
font_01_sfnt_off0000d6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0A 16316 bytes
SHA-256: b89083b4406a32685f1dee05588dbc66deb84dbb547547474da574e18a49f611

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