Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e3777897dc9889…

MALICIOUS

PDF

113.9 KB Created: 2021-09-05 17:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b2e14a816f022331eec67b7548b3f3a3 SHA-1: e9ee147321239256d38bcc54a2ae7af62340e0ab SHA-256: 72e3777897dc9889b70fe40ec60da1d7c2bdeff626c0ee3e2182f2a9a54e86ce
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. Several heuristics indicate the presence of link farms pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to obscure the final malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072db9705ecf---94860579144.pdf In PDF document text
    • http://mintaialuminum.com/d/files/pazadovagevekinafam.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/dinawipiwunuxagiginereko.pdfIn PDF document text
    • http://schturman.ru/files/files/pujorurufedevanes.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/audc69lpsf4n87s9ir5dvhtrn4/12840152694.pdfIn PDF document text
    • https://aromamarketing.md/img/files/59884817338.pdfIn PDF document text
    • https://siangyun.com/upfiles/editor/files/linutinomilutojuto.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/fowebolo.pdfIn PDF document text
    • http://xn--szabowski-tub.pl/userfiles/file/figizoravubez.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/f3ad3386adea61cb6e474806bd2ddfae/nonimenem.pdfIn PDF document text
    • http://noithatdangcap.vn/app/webroot/uploads/files/kowadamo.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0a3f362e8---xafigijedujemo.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/gabumezusefo.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160773463840d8---91352942800.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/65517929649.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/cb7a3bba67c510e1a58cb3fef225eb94/buxuf.pdfIn PDF document text
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/70814724683.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/rolunozidawosef.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/vugejolimikomuwofij.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd641829c00---76798340165.pdfIn PDF document text
    • http://amandamaitland.com/images/file/bezazigupipetige.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/rokigujoj.pdfIn PDF document text
    • http://nissanotogovap.net/uploads/images/files/68577595416.pdfIn PDF document text
    • http://ccspevents.com/clients/24998/File/1865419073.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/bepafepaxejosom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=impressa+f50+bedienungsanleitung+pdfPDF 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_off00014fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FFF 11168 bytes
SHA-256: 375986d1fed09e32d96edd759dcbccce8c023276c7de1c8174914ed5567593dd
font_01_sfnt_off000169a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169A2 22204 bytes
SHA-256: 228d2b9bb218272d841fbb1c054a0731175fa6827fb54ca017b130cd639e57cd
font_02_sfnt_off0001a156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A156 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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