Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab2e08a0af586c7…

MALICIOUS

PDF

81.3 KB Created: 2021-09-03 08:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c3b41cad802638c2f03deff13f6f85f3 SHA-1: bbd29acb489f9afc5e74b3c4b0b0a019519d90b8 SHA-256: fab2e08a0af586c71eb1f83871eeb95c46a552a6e1c23b1c7f8cbae17866222a
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL heuristics and AV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://drafthe.ru/uplcv?utm_term=candidiasis+en+el+hombre+tratamiento+pdf PDF link annotation
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082456adb173---komexaliwagapom.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3b1922890---zugojiv.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/tosoxefemivu.pdfIn PDF document text
    • http://guitarenko.fr/img/files/60968946690.pdfIn PDF document text
    • http://slhs1958.com/clients/18590/File/vavuwinenipatumegumu.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bv8c787vucie62v7o9dph8ait2/dafexisotaseza.pdfIn PDF document text
    • http://china-zzld.com/uploadfile/file///2021062011032573.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/wawoz.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/37fe08875354e0ce1a321bbd1b02bd5f/jugufu.pdfIn PDF document text
    • http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/lepopageroxinasepividexep.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/3943ef76b9d65cd1155a0c0d902df471/zewapejenupiwutez.pdfIn PDF document text
    • http://jaqalsports.com/files/file/kifitelazedaritunabaka.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/f2b25ba20bc404177ad85e56ed7ff0df/57648786533.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/muwokopinademojilakiti.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/powabemu.pdfIn PDF document text
    • http://tj-1970-50yr.com/clients/e/e8/e8fccb6fb94f20b6ca4375945b3939e1/File/gogixewu.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/57881133490.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16082583293b44---54679619336.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/e4de71451df39193f4cd557bd8574b22/52586554950.pdfIn PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/rebulebejivajumev.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160778fab6b1d9---komuzopigozebokurajezad.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/32389194468.pdfIn PDF document text
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/8necb1j9lpovagog4cts6n0jp7/bewibapewaxu.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/22eg4ts2dc25d000lih44f5id8/pawad.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_off0000d908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD908 17996 bytes
SHA-256: 017565ce5bb5d1c59a32ec251668e27af1f2e92cd959fd64d20a1115189f857b
font_01_sfnt_off0001069e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069E 10936 bytes
SHA-256: ee114bebb74b8b7656fe207239c3d6ab2b90f564ce66d69c57fa4cfc4952565b
font_02_sfnt_off00011f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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