Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc86a2cb3635ec02…

MALICIOUS

PDF

87.0 KB Created: 2021-09-23 11:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4e9de20733d60f7c502ae5f1f5e57f66 SHA-1: 3a16fcfe2f3f5dc63a7c0d942e8f981a72ccc22d SHA-256: fc86a2cb3635ec026cb0198da2a7eb3ff557df5f4c1c396f08e312ebc1113a90
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 embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm structure, suggesting the document's primary purpose is to redirect users to external, potentially malicious, sites. The presence of multiple PDF-related heuristics and the ML detection strongly support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://allytemp.ru/uplcv?utm_term=dream+league+soccer+21+apk PDF link annotation
    • https://eghamatkade.com/basefile/eghamatkadecom/files/32404731742.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/j1uh27pc8hrat86l3k2p0c8rk4/82974130666.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/61456738475.pdfIn PDF document text
    • https://8foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/21656386014.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/suvobuxaw.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/74986542514.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/62417861674.pdfIn PDF document text
    • http://leylasuren.com/images/userfiles/imagefile/80660754194.pdfIn PDF document text
    • http://cmorshomecareassociates.org/uploaded_files/userfiles/files/govanabuwuduluz.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/xuwevovubugofomizagabuf.pdfIn PDF document text
    • https://eclearusa.com/images/file/wojew.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/88129faf36a564b0d8f137f436b16c46/60158108523.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/kezasusizakovusaw.pdfIn PDF document text
    • http://nurugelexport.com/ckfinder/userfiles/files/97847432111.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/sisimizowobupojobu.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16134a0a75fb6c---boretolaboxuz.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/bosanix.pdfIn PDF document text
    • http://nincity.de/inline/file/73514204199.pdfIn PDF document text
    • http://ttc-investco.com/img/files/nubug.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/9191643414.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/tufirutono.pdfIn PDF document text
    • https://profession-your-dr.com/uploads/files/202109081122403040.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/22306647779.pdfIn PDF document text
    • http://kd-council.com/upfile/files/34084956191.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/37256208782.pdfIn PDF document text
    • http://secretinvitation.net/images/files/vivejexuvegojaxozoz.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_off0000e89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89A 10788 bytes
SHA-256: 910687f733af59ea1aa910c895f63039477420774552e6fe59b14f29fd41866c
font_01_sfnt_off00010198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10198 20240 bytes
SHA-256: e5fd27748b3ce44e430800045a8d34a279aeff1c9379af2f7829cc405e125042
font_02_sfnt_off00013643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13643 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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