Malicious PDF — malware analysis report

Static analysis result for SHA-256 1267cdc47e215ea3…

MALICIOUS

PDF

86.2 KB Created: 2021-06-25 19:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7cf3a8772ef3d131592b9c7c97144017 SHA-1: 68837a7665a5afec4dc6a3766b76012f9a49ce4c SHA-256: 1267cdc47e215ea32f6d792f0babcf34ae0733bd1d9bf19e176e02080918c8e4
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs that point to other PDF files hosted on compromised CMS platforms and disposable domains. This suggests a link farm designed to lure users to malicious content, likely for phishing or SEO poisoning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://adabaskimerkezi.com/upload/file/xezom.pdf In PDF document text
    • http://ajivikafinance.com/userfiles/file/12431522722.pdfIn PDF document text
    • http://woodsfamilypride.org/clients/2/2c/2c83419adcf4927d74d3defe18342386/File/jakag.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/17513427479.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/fuvisoweja.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/lonevodusur.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/783908731a636ff03cdcfcd2bd24d252/tumawakujezare.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5357f50aff---tadojusakufaxeg.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/tipukokivoguvegodex.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/ca00141ffb80c8f90cd063862c93a892/duvasiximafimuxabobiwaxo.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798c9041701---jogivapobufatirel.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/losaxirezitoxuwomorikonur.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/xariduvopapifoxabokesogex.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/1oh62g7ibgs60v1rks2o8sluqh/budidarewevuwuferenor.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/xumopavemu.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16072b99bbfc3e---61135371610.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/b7fd61fe9b86b06f8ca56383b1ddf6b3/57592641259.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/zivizijuximep.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/ribaropevalisewunufa.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c93e44518d---befupafovozutepa.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/ziporifixawisijosun.pdfIn PDF document text
    • http://centronegozi.com/public/72909594467.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/9diglurouukkp234qsishasbma/10919896580.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/ni56icmac7heduejk5qa7j87pl/48713391207.pdfIn PDF document text
    • https://sayurhijau.com/contents//files/liselaferazo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=puns+with+greenPDF link annotation
    • 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_off0000ed6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6F 17952 bytes
SHA-256: fcf983e27a61361c3572d33213b21599500aca58cc098768b196f6fe341fd23e
font_01_sfnt_off00011c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001348c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1348C 10244 bytes
SHA-256: 17d8f4211e0316fb5885c42b7a7d6b774086fac4731063cdf2d15547b46c9417