Malicious PDF — malware analysis report

Static analysis result for SHA-256 2852ba7fd3a8edbb…

MALICIOUS

PDF

49.7 KB Created: 2021-10-06 06:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 13389be58ee2fbc8f5d3f882ad630769 SHA-1: a1d24c2d2f04e99a2cdd875043ae39a6597f7ea8 SHA-256: 2852ba7fd3a8edbb825b661fa82b57488441491f7d29d61ad71bcac032ab23e1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites and disposable domains, indicating a phishing or malware distribution attempt. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The embedded URLs are designed to lure users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7782

Heuristics 5

  • 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
  • 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://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/8b7e25b55e0e62388ea3fe8ee7a5ff36/robevutaxa.pdf In PDF document text
    • http://hide-bo.com/img/tmp/file/5980004949.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/15215822418.pdfIn PDF document text
    • http://fashionflutters.com/ckfinder/userfiles/files/rudumugefotatusekim.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/80951230855.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/67582caf9c7336a3fb71b0372190dc86/bitokokuro.pdfIn PDF document text
    • http://stylekd.ru/files/13846909090.pdfIn PDF document text
    • http://designgaleria.hu/userfiles/file/tujurogibazudu.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16150a421caa13---nifefuvuvewot.pdfIn PDF document text
    • http://autavrabek.cz/obrazky/file/43142888895.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sesuti.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload/file/faxewugazeg.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/dgq68u55kp4tp02b6l2tt9uoje/vepiliviletufofo.pdfIn PDF document text
    • http://bacvietexpress.com/upload/userfiles/files/tobadam.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/puzepozusavi.pdfIn PDF document text
    • http://dogoxuavanay.vn/uploads/files/wowivosipexiduze.pdfIn PDF document text
    • https://em.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/93490521559.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/44638998694.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/42066617137.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/edcd2db88eece43a9af3a99c327c7fe6/jalukija.pdfIn PDF document text
    • http://homeloanz.net/images/e/file/74683187940.pdfIn PDF document text
    • https://x-software.cz/data/file/lutedosawosukiz.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1613fab9d72b9c---tiwusabizekesevalevujexon.pdfIn PDF document text
    • https://lorus.rs/files/rasokapijimowidam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=good+fast+cars+under+5kPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB268 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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