Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede9152704975136…

MALICIOUS

PDF

72.9 KB Created: 2021-09-03 14:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1f2ebb99562e443c7da985a7f1ed51ce SHA-1: a9419181e3dd04996ad2ac4b4921294e1e48966e SHA-256: ede9152704975136dd1cc1689e19a66840599d056abb4e1792bb612303860a13
156 Risk Score

Malware Insights

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

The PDF contains a large number of external URIs and link farm heuristics, indicating its primary purpose is to redirect users to other sites. Several of these URLs point to compromised WordPress upload directories, suggesting a tactic to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://nomylo.ru/uplcv?utm_term=term+paper+pdf PDF link annotation
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd41c375e48---33296834334.pdfIn PDF document text
    • https://www.naabelectric.com/userfiles/files/danarenesugok.pdfIn PDF document text
    • http://djapm.com/userfiles/file/67812249869.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/6847670542.pdfIn PDF document text
    • http://hccc252.ca/clients/e/e4/e484b38507f190a955b66748903449e1/File/96494438552.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/q2uc866s5fcre8jd7jjev2qaka/fanotuvegewuzepemado.pdfIn PDF document text
    • http://www.toptehnik.si/images/62890380594.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/8b2531d12720a3743bcf09732486ab46/57624885386.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/tqs6uu8l3feef0kqfkgrt3ts54/muzujajinupedat.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f6766d50b---najikanitofobofakut.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/140443c346a073f912642c53d31637b3/67908383003.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5741051da9---69873804382.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/58108763978.pdfIn PDF document text
    • https://ssmavidiyar.com/public/content-images/files/rupatepalomakasigake.pdfIn PDF document text
    • http://mastersequipments.com/ckfinder/userfiles/files/bobomonizosut.pdfIn PDF document text
    • https://pnlcoach.com/misc2/file/In PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/ribabawezidigat.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/bigetadiwitajoxaw.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/ka5eu4c9llk1uqh99re0unj8u1/xokasixefopexakamapi.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/savubijoxaxonubigisabowen.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ee58ccd0d593f8697d1cfa81b1c936a4/97645145373.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_off0000bb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB8C 9996 bytes
SHA-256: bf679d543fbe8dba4aee24f7565cbc7609fdb3ac71112445a5dac8ccabf35591
font_01_sfnt_off0000d1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BC 17744 bytes
SHA-256: 22e926311fef908a5490adcd0ca375997e902da6f5db5c84507cf7ea5262acdd

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