Malicious PDF — malware analysis report

Static analysis result for SHA-256 223c0af01e92e220…

MALICIOUS

PDF

71.7 KB Created: 2021-06-05 08:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 39a039c36208987659736a0b83a104f0 SHA-1: 206eccaa4e33f40da014d1a6a394b73ea56229c0 SHA-256: 223c0af01e92e2204504e9916fbe21916eb44d0b0131fe5786d2714932c0de26
136 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains a link disguised as a free download lure, directing users to 'https://smidgel.ru/pbw?utm_term=confrontation+jekyll+and+hyde+sheet+music'. This URL is likely used to deliver a malicious payload or conduct a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://smidgel.ru/pbw?utm_term=confrontation+jekyll+and+hyde+sheet+music PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369645/normal_5ff65e0227aee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428078/normal_603078ddab648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421360/normal_60b95b72deaa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393016/normal_5fd1dde3deb10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489251/normal_600b136593a7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414860/normal_6002984752137.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471253/normal_6032305e88ff7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://papoxuva.pbworks.com/f/iphone_4s_icloud_bypass_9.3_5.pdfIn PDF document text
    • http://sezipakupuw.pbworks.com/f/39431514656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7424aabd-dcec-4439-8abe-2f2631d0e8ec/why_does_diesel_engine_make_more_noise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ddb35c-b6ad-4e20-aaa5-5651ec0b74db/ohms_law_and_power_practice_problems_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0d8236b-3894-48ce-99f2-e4df95d0e52a/dofoberajatevoriz.pdfIn PDF document text
    • http://luwivaj.pbworks.com/f/maintenance_technician_job_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdec1deb-457d-49c7-822d-c88afe529502/black_and_decker_20v_lithium_battery_charger_lowes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78fd17ac-5906-4c15-b6b7-3757b558af01/cisco_spa8000_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae6aced-68e7-4431-8a68-7bbfbd06ae32/nanademajukapavaxisatokus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aadc2d26-1457-42ae-acc6-526c99a951f4/jizokuzekadorowoxenutefiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68566d30-3fe6-4306-af14-e40a0cf1f3a5/1758039806.pdfIn PDF document text
    • http://jilawuxifi.pbworks.com/f/pixisudefezemori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91884215-5be6-43f4-b6ae-028c5a5bf662/76547002676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21f0f62a-0676-4deb-8318-b8a2037a9314/navanosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d24858-5783-425d-9ac4-4ad14d43f39a/72082308497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc5698e-cd8a-49ae-a650-dc5774ed193d/sales_action_plan_examples_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_off0000d9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E7 5408 bytes
SHA-256: b1d7eb6d8108d05c3fea09650252b8f9da2ce594824697809726c5fa3a225e23
font_01_sfnt_off0000ec31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC31 10872 bytes
SHA-256: dbf0d93aac7f76712bdacfef834623d6004c9bd4c02cf917a4db74877ea12995