Malicious PDF — malware analysis report

Static analysis result for SHA-256 79307a715b102082…

MALICIOUS

PDF

218.9 KB Created: 2021-07-14 00:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 449c9aa83fe9961ab3acc0d383f247bb SHA-1: 5996eb5b8a9e25605a010db6a0ef05ab82323eae SHA-256: 79307a715b102082cf4e67881739301a0f4b3840ed6503925bfec837c80e1a8a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect the user to a phishing or malware download site. No scripts were extracted, but the presence of multiple external links suggests an attempt to lure the user to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9565

Heuristics 5

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=how+to+rap+to+any+beat PDF link annotation
    • http://jessie.vn/images/ckeditor/files/punuratilajobo.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607c22c151e13---94063311311.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/f7c6cb4253f0052d6c3e0109d2ad8dc9/tugatimijowuxatunuwa.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210612155436.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/13cbbc19ff5a4078c806cabdd00e899c/nuxilaxitefekuxitisesu.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/zetagatez.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/bumiwad.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/52482703264.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/23ba211dc1401c3d9132d0d06cfc48d5/38742343621.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/nedixulemalulesewanisufi.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160999c2d3d65c---4442215684.pdfIn PDF document text
    • https://lysgaards.com/ckfinder/userfiles/files/57857005838.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/49770346056.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/nuloku.pdfIn PDF document text
    • http://kbchina.de/upload/35450511746.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/23303804c4d9a74626d98b4d65a239e4/lexerepixevenufa.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160acfbcae90cc---78970011547.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2e0fa9dbb---548324871.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/46384015139.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/98350341438.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/68652347671.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/omb424ch3m22mad7tvn9nh6cmq/paxifegomaf.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5eb400225---7986630759.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608848a16895b---94561044137.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/87c969a510c03d403b9f0610c54077b8/kafimaganoxopavefiwotifop.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/kelixew.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002e415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E415 19364 bytes
SHA-256: 4eff262cac542207474effdd534dd32b3dbcffcb354294b8da848c4708c7cbff
font_01_sfnt_off00031768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31768 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00032f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F79 16480 bytes
SHA-256: 7788dcb3d7bbfd77ef91bd74225013e29873d106231d6fb5512b4a7729ffd093
font_03_sfnt_off0003466f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3466F 10268 bytes
SHA-256: be9a96f5bef3f4fc2c823cd80d66877724cf3e487237153b30507f4d6cac727b

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