Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f60d423aacd77e3…

MALICIOUS

PDF

106.9 KB Created: 2021-05-23 12:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 610485e7e7564a7fef03af75b037df39 SHA-1: ecd150e513fad31db889af152e3ea6c9efeed9a9 SHA-256: 0f60d423aacd77e327c9453acb843f462807f538034061119136ac21c4cef97f
136 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains an external URI and an SEO redirector link that points to a URL commonly used in phishing lures. While no scripts were extracted, the presence of these indicators suggests the document is designed to trick users into visiting a malicious site or downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://cdn-cms.f-static.net/uploads/4465687/normal_60634a650cb6e.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380857/normal_606e1cee1152f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375350/normal_6060fde839dfd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/dRGGkpkNhSI/wb?keyword=what%20reading%20level%20are%20the%20chronicles%20of%20narnia%20booksPDF link annotation
    • https://uploads.strikinglycdn.com/files/bbae96ee-ad46-4068-b785-8e2807671bc4/us_navy_maternity_leave_policy.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/sat_test_dates_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5ff8cbe-91ac-4949-8487-f140a1a977f2/winekosobuvasebonoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77748092-6a62-450c-a305-dd8b1e5e8b8c/bugipebiwimegesora.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/conduction_convection_radiation_multiple_choice_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7fae5e1-3079-4721-82da-783a2e1dc1ab/kindle_oasis_2020_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/nanda_diagnosis_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/97225040220.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/45217491843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9cc0bfd-e3df-4b0d-b35e-8dfbc805f3d7/14375954837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c928af58-10ce-43f2-8723-f614d26d7fa0/how_much_does_a_microsoft_project_license_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/chocobo_mystery_dungeon_every_buddy_job_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d2c1ed9-9f32-4838-ac68-41c08f70c8e1/betty_azar_basic_english_grammar_4th_edition_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b0822ff-9a47-4f0b-931f-806ff21a3217/97709986627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aa653b9-2939-4d43-8134-a45f77b7da41/28218509561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74be8414-d8fe-4251-bf2f-018770490601/16312387182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7ac833f-3d21-44bc-ae3c-378957d84b52/telifevevepotuwesekubej.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/44655967605.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16567 5560 bytes
SHA-256: f549230748d43d20fa7ae3887ec55ae8dbe75d5587cd7857c0734bc1b477f10a
font_01_sfnt_off00017860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17860 11424 bytes
SHA-256: 3494e31a84f994a958647c3f4ed027d5195d2ab1d733e99392b5c625c64a01ca