Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e3427b18f2fe5f…

MALICIOUS

PDF

90.8 KB Created: 2021-07-08 08:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d679ab9c36793a1a4370b3d7ebd77436 SHA-1: 2ba3aefe3d41bb92f6fe7058d7995f689dbf2f47 SHA-256: 48e3427b18f2fe5f07a52e90271aca5420c267a65f39318da59ef16a29cb0d47
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised CMS upload directories, suggesting it's designed to lure users to malicious sites. The presence of multiple external URIs and link farms indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.bluefashion.cz/ckfinder/userfiles/files/91002382305.pdf
    • https://autoteam.in/ckfinder/userfiles/files/mazaxowijikevan.pdf
    • https://kuni.ro/app/webroot/files/userfiles/files/vikulana.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/f4ki9ajl1ocf8pkktnr776drt5/muzudikakarerokagasated.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073b06c1e574---13791833100.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e13377681be---96125144006.pdf
    • https://fruitssupplier.com/app/webroot/img/files/1397338422.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca87def4d0---39218253837.pdf
    • http://produccionesproezas.com/clients/2/28/28ea8f13eb032e89cab2838ec144e7af/File/joxosajixazowot.pdf
    • http://king-ber.com/UploadFiles/file/20210620092833645.pdf
    • http://baikalspring.ru/ckfinder/userfiles/files/37076963723.pdf
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/d42133a10c2d2283fcb782942f55e1bb/90374101754.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/b9b6730bcf06cbe0f661b4e20f64d7ff/tanuwaligiwuvivasezoxul.pdf
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/15184975185.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b006c5ec74f---zubawubazijemajivozitut.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f49790696c---zimisukuwopije.pdf
    • http://cncforginghammer.com/d/files/pimixotileralen.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/07f64e7ff7f680262fb3f88d71792ab2/93177354409.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16076b5ae6498a---41940620745.pdf
    • http://vuonlan.vn/data/upload/files/bogazexutamixulekiwur.pdf
    • http://anjilh.com/uploadfile/file///2021043021520066.pdf
    • https://bdaudit.ro/userfiles/file/lasalubuwubodipukoguvite.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16070a56692300---rowagakogurofemamodi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=prickly+itchy+skin
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001035c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1035C 16792 bytes
font_01_sfnt_off00011b73.bin
5d497dbb8f8c4295dfee25374a5e41f3caeee6651948831a6fd708a9ecf3d569
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B73 10120 bytes
font_02_sfnt_off000131ea.bin
d959286eb2c22e7f48585071104603568ac723b9c9c0b0f60291576986e445fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x131EA 17052 bytes