Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e12581f442f89b0…

MALICIOUS

PDF

86.5 KB Created: 2021-07-14 02:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a248b64f4a0c0b0af385f1050f2a7f42 SHA-1: c340a655a6675938a9a9d6b7d3ee079733738588 SHA-256: 1e12581f442f89b0ed7678af7057ae90c425afd965ef181209c3ad8b0efd604f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and the use of UTM parameters indicate an effort to obscure the final destination and potentially track user engagement with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/uplcv?utm_term=every+road+has+its+thorn+lyrics
    • http://gpe-el.pro/ckfinder/userfiles/files/54827342452.pdf
    • https://destockbaby.com/ckfinder/userfiles/files/62577852799.pdf
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/79266157141.pdf
    • http://prime-standard.com/piceditor/file/95829813390.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/2850f3833171baa35c1d722a82d3ce55/dedikifuforegama.pdf
    • https://artbynela.com/uploads/file/22039045178.pdf
    • http://airholic.com/UpFiles/WebEditorFiles/file/kepurezokida.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/b7f5e19dd0728f81041b1bb0da254153/79127980226.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/prt8mr5ilaq9rc464g0106rk58/4365726368.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16098412d05c2c---geperivuberi.pdf
    • https://skatrip.com/basefile/skatripcom/files/bigokakinukubodefezedifez.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a59994e73d2---vakepefadadexa.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d52770a845---wolazusiwiwigikesof.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/89c0aa0cc749f092dc620317b645f642/24951556637.pdf
    • http://woodsfamilypride.org/clients/2/2c/2c83419adcf4927d74d3defe18342386/File/xedaxixexoripuwilazup.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa67d04291---36330700208.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/6894c3b01cb108033e60f79858324a57/vufudakubutol.pdf
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef83870fc5---pubufawi.pdf
    • http://hollandunitedreunion.com/clients/5/52/52f3fdf721cdccceb566e47094f1d9de/File/29986931413.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876ed67329a---38430200504.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160874b9f8da49---pofikekowujogoluxoradoli.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c63f68dcb92---tonuwuwujoz.pdf
    • http://hotelbellevuepalermo.com/userfiles/files/vizom.pdf
    • https://ntct.dz/ckfinder/userfiles/files/87075224269.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c23baece3fa---buxujiwonudomidot.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/tmetk7d972j431em2ch91n8ge0/kovusoxerududokiv.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee9e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9E 16792 bytes
font_01_sfnt_off000106b0.bin
63bafd8af218db797597b7ae20247cdd896a3fb64e8c559b4caa03c01518cf59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106B0 17256 bytes
font_02_sfnt_off00013447.bin
88ea60f4f6e4c3abf46130636c6c4a6d4559f8eabec5f5664e5000960d90bf2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13447 10628 bytes

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