Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca9b223623fd5b84…

MALICIOUS

PDF

72.5 KB Created: 2021-09-06 16:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 205f8acceab5bc073bbfaa3ebaaff033 SHA-1: 3efc1dc2487caba5386eb10098e29836d2233d2e SHA-256: ca9b223623fd5b84a6c7aeddde5af4667c617e67f0745c47107e902e4e96251a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://narzedziascierne.eu/Upload/file/8773084535.pdf In PDF document text
    • http://union-montage.pl/userfiles/file/xorovutukuboxarem.pdfIn PDF document text
    • http://bennyhigh73.com/clients/3/33/33ce00c6a031cf3b17a3dcf69aaa7594/File/givipinimetanuwuzalo.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/wivemokijajikidof.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/lonozesapano.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb86be7051---golesezudetuwemo.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/94474957203.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/r3h7q2tta9k10v2eb47rkb8951/91919313309.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/wuxumunodoruten.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/67504841588.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a47c6c40da4---texapido.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/wilesomozulokexu.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/jilusarev.pdfIn PDF document text
    • http://aaronandanthony.com/userfiles/files/zosobatenuleperupegu.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5c23842ce---fobelubatizuwewubedaf.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73502061988.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/7f41d834ccf48516fbbe76b7f0d331a2/ropifubepaxuzivufif.pdfIn PDF document text
    • http://truhlarstvi-strakonice.cz/files/file/83964679279.pdfIn PDF document text
    • http://gcoekmr.org/cukashmir/User_Files/imagefile/89474218037.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c178034c3---sisefinuxinum.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac07a318144---lurogelotudevakugole.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161050e769faa2---29566190014.pdfIn PDF document text
    • https://combrooncom.com/contents//files/kunoxedarudusudapuwiz.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec63da18a3---44472595588.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=international+financial+management+test+bank+madura+pdfPDF 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_off0000b903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB903 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11A 11244 bytes
SHA-256: 5bd74f64e24269f7de39dd2f154227fee32ce820f4a9507dd6f6822036ffda48
font_02_sfnt_off0000eb01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB01 15932 bytes
SHA-256: 570b7099311e0c5f0a57cb576a6e461b67c81379eabd14c93b1bb5b80af9ac7b

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