Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ea5016a7b8cf9f…

MALICIOUS

PDF

68.9 KB Created: 2021-09-17 20:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eb8230f2655b7dbbe6ffb41f32dcd872 SHA-1: 33bd255fd9b5448a8ab5f2ff102cd0f09f8912d2 SHA-256: 15ea5016a7b8cf9f1661d5479b3beff05d1fcfeab2dbdd38a63ac21efb0d17ac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many pointing to disposable hosting, indicative of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of embedded JavaScript suggests an attempt to exploit vulnerabilities or perform further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613b6d25e1734---zetimizowogasek.pdf In PDF document text
    • http://ldkxzzs.com/images/userfiles/file/64827484403.pdfIn PDF document text
    • https://mccartha-cobb.com/userfiles/files/71535550015.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4529480050.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/puludipupisoremonuguki.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/82367916865.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/31917748532.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/tifavupatukaw.pdfIn PDF document text
    • http://mastervgtour.by/var/upload/file/62777879748.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/kovulajavutajavutusefokit.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/likesoperewa.pdfIn PDF document text
    • https://qian-ho.com/upfiles/editor/files/52915447898.pdfIn PDF document text
    • https://dla-pracownika.pl/pliki_user/File/72322577365.pdfIn PDF document text
    • https://nusbetaja2.com/contents/files/renev.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/kasegupaverif.pdfIn PDF document text
    • https://dzido.pl/userfiles/file/92543821486.pdfIn PDF document text
    • https://sinarwaja.com/account/files/bifaxozupikaxelilojus.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/mevoror.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/bexubadetonexowo.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/1487379078.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/vodebabepujusewogiler.pdfIn PDF document text
    • https://webornate.com/viking1/uploads/files/38761732347.pdfIn PDF document text
    • http://gtlfuelmarine.com/userfiles/file/45294972906.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613c6776b407d---29213162737.pdfIn PDF document text
    • http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57313419334.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=nikki+up2u+mod+apk+unlimited+moneyPDF 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_off0000aff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF0 14924 bytes
SHA-256: 93f1f992b36673812a95cb9f3fc72326da3fe99f3155d479c9001dc38d05f747
font_01_sfnt_off0000d54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED61 10688 bytes
SHA-256: e1db953051c150522eca1cda979a30c3d3f1c0b828c1c9bb3b8c161c1017310b