Malicious PDF — malware analysis report

Static analysis result for SHA-256 1717c717b16c3bd1…

MALICIOUS

PDF

74.6 KB Created: 2021-08-28 08:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 2f86a1031958e3264561ab2ab6bce45c SHA-1: 53e2bf1fbe3d42953970018850173668a5c91acf SHA-256: 1717c717b16c3bd146161473bd7cf9b87ae7813bcbd8546214c04a9f1210ca2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, designed to lure users to malicious content. The presence of external URIs and link farm heuristics strongly suggests an attempt to redirect users for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://crysiq.ru/uplcv?utm_term=harry+potter+theme+music+download+mp3 PDF link annotation
    • http://nage-z.com/ckfinder/userfiles/files/munevututejadaliduj.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/bulowekowe.pdfIn PDF document text
    • http://noithatphathuy.com/Images_upload/files/34091754788.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ac918234d---59537480186.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8b5d59ce6---50630230645.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/loxiwoxugemedepinug.pdfIn PDF document text
    • http://mixline.ru/img/lib/file/88778476117.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16088251f6da56---47634261870.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-8-25/20210825234909297919.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e91220bb5---8709383138.pdfIn PDF document text
    • http://parcfamilyreunion.com/clients/b/b3/b3ae52aef0329bb57e848b27182677c8/File/91605326820.pdfIn PDF document text
    • http://web68s.com/upload/files/zademiwadoso.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/r6t80vdnntd52oa0sl63vbqogc/98687585481.pdfIn PDF document text
    • http://yoga-privates.com/yoga-privates/file/54417095949.pdfIn PDF document text
    • https://laser123.com/geektic/files/22422125947.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c96431d0840---kopikakifaje.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/c8943dab14b882e0ec2c818500b17492/bugigutomil.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16128478347b8d---pabonefixama.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/90647760761.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/xazadavimib.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/50392884628.pdfIn PDF document text
    • http://www.nagsa.es/ckfinder/userfiles/files/jisugel.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_off0000c0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D8 15916 bytes
SHA-256: 26ea930a6ee146018e18816e12ad40a2bb1f406a26ad8cb794c6771e384fe1d4
font_01_sfnt_off0000e9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000101c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C3 11240 bytes
SHA-256: 9f6c30b2f0af3b1370992c51958beeb8817d0485034d9ac1b5723e2bbb169c44

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