Malicious PDF — malware analysis report

Static analysis result for SHA-256 299a70802d565baf…

MALICIOUS

PDF

78.9 KB Created: 2021-08-27 10:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 9e780d7ad8f23e1812af7bc83a06c1ff SHA-1: 3d8f50fb7ab76f38312e03c2381c21e7142fdff1 SHA-256: 299a70802d565baf52a1ca49cbd710a01e2541d8c7d619983dedb90a4c260402
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/1jcne1njkhetgqu3a9md2t8bd4/20833848311.pdf In PDF document text
    • http://xn--b1adbbbaeqjtsflbfms0e.xn--p1ai/pict/file/vadavekivokutasapuronolab.pdfIn PDF document text
    • http://hasyo.net/files/file/53924324460.pdfIn PDF document text
    • https://music-group-store.com/upload/files/jurejenofibupanipu.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607064210a43e---sukajunopubowusu.pdfIn PDF document text
    • http://puisan.ru/uploads/file/bajurebexogolipuzodib.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/5567370570311a6d9aaf22a1cbdc762f/begud.pdfIn PDF document text
    • http://aiaato.com/FileData/ckfinder/files/20210824_8326DD48B923C45D.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/turer.pdfIn PDF document text
    • http://haai.org/upload/file/bakusemabozikifarojike.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/ccbfeffc251aecad68b303b22e4fefc7/bifujalokorevevitilapa.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/28758865238.pdfIn PDF document text
    • http://rudolphi.nu/userfiles/file/38392392364.pdfIn PDF document text
    • http://hsound.ro/images/custom/file/rinulefawilakerepikitis.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/54659088476.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/jb85v8md3l6l0dflauouh6u7d5/siviz.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/62518724309.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072df3c2f719---vokatetererexulepuki.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/fawegaketolokamugami.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/72403262268.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/63adqqjgetkcbpf63dsnml5rd1/vetefunufa.pdfIn PDF document text
    • https://wojczak.pl/userfiles/file/duzilizogununeduwu.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/mizupim.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/ee0gok8h501i3vcuh2ef74rsbl/36381684565.pdfIn PDF document text
    • https://rafaela-motores.com/userfiles/file/43343487398.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=getting+your+tubes+burnedPDF 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_off0000d252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD252 10608 bytes
SHA-256: 1c3ebbb942697a745ab33fe42feea54cc9dd0d30b3d041c0eac850efb49ae9cb
font_01_sfnt_off0000ea8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001029e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029E 16620 bytes
SHA-256: 4c836a6ed3805f98fa331a3a195bbfb8dadecdacc6b4257a9240f83a7a6619dc