Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09e7fe5aba7718c…

MALICIOUS

PDF

67.6 KB Created: 2021-09-28 04:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 94e3a077bd31be2b9de8ad7746b7ca3f SHA-1: c8f09269c4b6ae879b420ba2bfc08a9767245245 SHA-256: e09e7fe5aba7718c167f61d86d611ae26ae19c9e57a8e332c302c5b75d930e04
174 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and is flagged by ML classifiers and ClamAV as malicious, indicating it's designed to exploit vulnerabilities or deliver a payload. The document's structure and heuristics suggest it's an image-based lure, likely a phishing attempt to trick users into clicking a link for a fake charge, refund, or subscription issue. The embedded JavaScript likely facilitates the execution of malicious actions or redirects to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://vkts.se/userfiles/file/soxowunamilim.pdf In PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/7797694492.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/59910683877.pdfIn PDF document text
    • https://mkontakt.com/dat/file/91665136647.pdfIn PDF document text
    • https://leganordavigliana.com/uploads/file/14854966665.pdfIn PDF document text
    • https://brincandoeaprendendo.com/fotosempresa/files/83033977773.pdfIn PDF document text
    • https://serihosting.com/calisma2/files/uploads/pefiso.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/3173499276.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/5sgp0una3lj14ippojtaqq2dbk/25471246581.pdfIn PDF document text
    • http://ilsogno-bomboniere.com/userfiles/files/jaxuwoguwekejajenoxojifek.pdfIn PDF document text
    • https://www.willmarareachamber.com/ckfinder/userfiles/files/21685685660.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/99733489638.pdfIn PDF document text
    • https://austdoorcaocap.com/upload/files/41000630869.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/dodudanurunojorapu.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/92044558230.pdfIn PDF document text
    • https://ausztriasi.spawellness.hu/upload/hirlevel/files/denajago.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/92471018232.pdfIn PDF document text
    • http://altus.pl/userfiles/file/27224636097.pdfIn PDF document text
    • http://studio-rivetti.it/userfiles/files/28248305957.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/sasumevaxi.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/76590452727.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=omega+android+wear+watch+facePDF 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_off0000ad65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD65 13836 bytes
SHA-256: 62729ce9b1291dd277812ddc389cd5b5232110d15b9c11634be1b91fb89ed6df
font_01_sfnt_off0000cfe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F9 10820 bytes
SHA-256: bd1d8ce5eab77fce0d7ae408c63842ad6e865678777d60f021d56521db48782d

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