Malicious PDF — malware analysis report

Static analysis result for SHA-256 b56053bc38fc4057…

MALICIOUS

PDF

105.2 KB Created: 2021-03-07 20:18:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f53ca4bb106890c2fee12794b8a2f023 SHA-1: 2b61ad232829459563c315609cc15ff27e7ab15a SHA-256: b56053bc38fc4057b677fc842d9a01254e23388c64560fc53ba4de3b68361450
136 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It contains a lure related to online payments and school districts, directing users to a suspicious URL. The presence of embedded URLs and the nature of the lure suggest a phishing attempt or a distribution vector for further malware. No scripts were extracted, but the PDF structure and embedded URIs indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://kuzutuzo.ru/wix?keyword=ez+pay+online+westlake+city+school+district PDF link annotation
    • https://cdn.sqhk.co/joduragenep/hfigNie/poster_maker_flyer_banner_maker_graphic_design.pdfIn PDF document text
    • https://cdn.sqhk.co/jojipimuve/XmpyoTK/xetetebul.pdfIn PDF document text
    • https://cdn.sqhk.co/siripeka/dEicidw/klondike_adventures_game.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/gwkTgc6/vodojaperukamijipesivo.pdfIn PDF document text
    • https://cdn.sqhk.co/josurowelimu/dyANjam/teddi_mellencamp_all_in.pdfIn PDF document text
    • https://cdn.sqhk.co/pomisiforuko/e3jdnje/fenakovusejugojome.pdfIn PDF document text
    • https://cdn.sqhk.co/suzeboxiwo/lg9PLgf/dragon_ball_z_stick_fight_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/28285882088.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/73824236725.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68ca6a7f-65f4-4c19-b9f7-0e19d4fec22e/mepokelijolojewup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a08b779-ab12-4a80-9355-6a95a29ad741/edtpa_task_3_assessment_commentary_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1571d6d-eb53-4983-bb33-cf0501cee64c/lepexanutoboluju.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/jalawixaku.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/past_form_and_past_participle_of_become.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/westlife_total_eclipse_mp3_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/whatsapp_status_screenshot_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e878d99-d8ea-4d6e-ac90-ba5b340684e2/vuvivuvizimited.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/tasutiberugapuxaxefutol.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/96623650452.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/content_calendar_spreadsheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2baa62a-5d1c-4f17-9273-848b987ba495/40451455024.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/buffalo_fight_video_free.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_off00015e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E59 5428 bytes
SHA-256: 49d0797883b690aa075b960cd59a79c661979523b6fd19d71242a634e2e55ad9
font_01_sfnt_off000170eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170EB 11540 bytes
SHA-256: e9b8eef7d770344eabc345825935a87e0e1edb2e627af6f92443192997908d6c