Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9bb787420ebe0f…

MALICIOUS

PDF

84.0 KB Created: 2021-03-13 23:36:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb7e064827f1dd342f91f08139454b84 SHA-1: d6fde710636c05d3e4798cc0e9f1013919eb4875 SHA-256: 7f9bb787420ebe0f85068f8462b6a01a6f857286babc7d2513fba60c5ed7727e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, including one pointing to a business login page, indicative of a phishing attempt. The presence of a 'download button' lure and a callback lure further supports a malicious intent. ClamAV detection and ML classification confirm the malicious nature of the file, likely a phishing document designed to steal credentials or lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/123?utm_term=nadaguides+business+login
    • https://cdn.sqhk.co/zotenejek/ibhjoia/pirenetularigezokegu.pdf
    • https://katinena.weebly.com/uploads/1/3/1/3/131383377/591952.pdf
    • http://changepass.online/how_to_become_a_reiki_master_for_freecp4q7.pdf
    • http://unreguezff.rest/dulunaxeqmfm7.pdf
    • https://boxoxezerutevok.weebly.com/uploads/1/3/4/3/134317212/2495695.pdf
    • https://toxutumopomepe.weebly.com/uploads/1/3/5/3/135327812/tuvifaza.pdf
    • https://dukikabapesudux.weebly.com/uploads/1/3/4/1/134108868/rogativasaxokeputi.pdf
    • http://sifinujox.sportsontheweb.net/45003046741.pdf
    • https://cdn.sqhk.co/vovewotutal/jjdT5ii/rexeretadid.pdf
    • https://nojinogexosop.weebly.com/uploads/1/3/4/6/134695112/buzufimudowusefog.pdf
    • http://meetcabinets.xyz/introduction_to_environmental_engineering_5th_edition_solution_manual1b5iz.pdf
    • http://kufafukedexepix.mygamesonline.org/what_is_the_equation_to_find_slope_from_two_points.pdf
    • http://dokojekiferej.mygamesonline.org/41330082010.pdf
    • http://opticsystem.website/gramatica_del_uso_del_espanol_c1-c2xc9gg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://e05653fc-386e-4c8b-889d-738aee72c63e.filesusr.com/ugd/62421a_a2227a142f97419d8b8a1526e0c67e7c.pdf?index=true
    • https://s3.amazonaws.com/viwoxuz/jitasigixefolirabe.pdf
    • https://s3.amazonaws.com/bezorito/joining_report_letter_after_medical_leave.pdf
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_5aad348efb7f4e0caefdba72b3ebea36.pdf?index=true
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_9ac5861c08a949cba62746296e4c5006.pdf?index=true
    • https://s3.amazonaws.com/gekojulog/angular_define_object_in_template.pdf
    • https://s3.amazonaws.com/fedojigudaj/sojavedijonekik.pdf
    • https://s3.amazonaws.com/jaloto/android_adb_error_device_offline.pdf
    • http://gupatevefojip.myartsonline.com/vukofofafabesifubatadilur.pdf
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbe5.bin
964f4c755cee7b97eb81bf30e4bd1edf99af1fb219bd3ce758287d5f85b1a2c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE5 4808 bytes
font_01_sfnt_off00010c37.bin
b39cfbdb8d905587ffc5ac03c4233eced349cef3c6d1039399cf6c09507fd662		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C37 11720 bytes
font_02_sfnt_off0001342a.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1342A 4324 bytes

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