Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fbe009e8695bdc2…

MALICIOUS

PDF

80.5 KB Created: 2021-09-05 00:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8841e00058de5321bd3e693a39d31e7f SHA-1: b66ba477ad35a8979bd582b2027897b81ee9d129 SHA-256: 7fbe009e8695bdc2b447697e9a1e97a5f1e6f0716d4eaf9db007d73ae25c65b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted, but the extensive use of external links is the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://smidgel.ru/uplcv?utm_term=alliteration+worksheet+preschool PDF link annotation
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/0fbc647f807b80bb95ea187fe1991084/91609929792.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/4vtkohpu5i44kfnn5r53mrq21v/75709017037.pdfIn PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/feleva.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/movesapo.pdfIn PDF document text
    • http://hillhouseclassof1961.com/clients/c/c9/c9b049383fb65e98d0a4dcab6c176392/File/68652447260.pdfIn PDF document text
    • http://plncse.hu/php_data/file/88324089981.pdfIn PDF document text
    • http://wijnhuis-vaessen.nl/site/data/ws/files/rujudasexiwameviwibo.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/ampuk3455u9q0frtr4si86ter6/lofisewajawopugew.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e49adf28334---5666947474.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbbcbca09a9---7893817976.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/xidofitoz.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/disaxuko.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/59280847145.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/nawuwodulozigefivig.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160860f1b8c825---xobujijosi.pdfIn PDF document text
    • https://rumahbaruku.com/contents//files/polosatitosebepawepoxe.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/17647033096.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/97763012051.pdfIn PDF document text
    • http://perfekt-dom.pl/designhome/admin/userfiles/file/16902278648.pdfIn PDF document text
    • https://csam-villepinte.org/uploads/images/file/xefisunebigepibodujoluvor.pdfIn PDF document text
    • https://activepymes.com/pub/file/masirugojusodiwoxixo.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/muliv.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_off0000d706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD706 17348 bytes
SHA-256: 67340246fa37d1424b4eae64aba04e59beba73f24a12c4db2ff6150c41b478c2
font_01_sfnt_off0001040b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040B 10628 bytes
SHA-256: 1c02fcc413d33ddd9162a395ffcd86943df2259a9c4700f8fb2e6486c9f76054
font_02_sfnt_off00011c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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