Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f54e0968ca0b15f…

MALICIOUS

PDF

77.2 KB Created: 2021-09-23 16:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7aaef6f93504650603ccfdc6c1d93b31 SHA-1: 706a5af2376f09f92beed74453508e9150dfa404 SHA-256: 8f54e0968ca0b15fe2bd5aaf49b900e554c5e5ff3c7e955d354f45424dd4b067
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many of which appear to be part of a link farm designed to obscure the ultimate destination, with one URL specifically mentioning 'download'. This suggests the document is a lure to download further malicious content. No scripts were extracted, but the presence of multiple external links and the 'link farm' heuristic strongly suggest a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://coretry.ru/uplcv?utm_term=download+novel+gitlicious+pdf PDF link annotation
    • http://stmarysharipad.com/userfiles/file/nemupozetadituzeditev.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/2e80516ea3a2e824738d23f4f04b7210/55752501426.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/1954708483.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/3652639570.pdfIn PDF document text
    • http://weiken-rc.com/upload/files/66775809260.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/7ee49ea2e1438f8d6f91866d365f1995/gosafovorib.pdfIn PDF document text
    • http://dlabiura.kbo.pl/ckfinder/userfiles/files/46737063530.pdfIn PDF document text
    • https://sistemkabin.com/ckfinder/userfiles/files/dofovuvo.pdfIn PDF document text
    • http://recit-de-vie.fr/userfiles/file/rubejetalazeve.pdfIn PDF document text
    • https://lesura.net/userfiles/file/83232099339.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/51010543403.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/rebetatepoxozezajafekeli.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/zijinozojomiwepaxinotex.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/gafobugorubut.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144f1255a3a7---wenepudomoxixanofosiza.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/pukajiralizijuletukejizi.pdfIn PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/93976895624.pdfIn PDF document text
    • https://www.lsv-wittlage.de/ckfinder/userfiles/files/vogasojan.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/gozime.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/8321876a724bcf330670c56ad7d0ecdf/mevaxidaxulobele.pdfIn PDF document text
    • http://danguykhoidoanhnghiephp.vn/Upload/files/vavij.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613e91f29d153---pokalebojipo.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/f364ce3a2467b1b98bc0af58ef9d6014/gubuvapamabat.pdfIn PDF document text
    • https://saigonservices.vn/images/uploads/files/jofekakivegewujoximik.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_off0000c756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC756 17768 bytes
SHA-256: ec30184b45affd2de3ac88142d833e7340dd52256af5b445e8a85ed288fa6c98
font_01_sfnt_off0000f540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF540 10948 bytes
SHA-256: da896a3cf358314691cfc7e2312fa451fa8dc3f4921aaf5dc9df34c09a2dbaaf
font_02_sfnt_off00010e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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