Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ff2a93b318d78c…

MALICIOUS

PDF

81.0 KB Created: 2021-04-05 08:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ca0bcdd96448867d53dd7716b746269d SHA-1: 3b26a2ed1909c7ba9db464d798c6f8c9db4e8eae SHA-256: 44ff2a93b318d78c9256244f82c6741ef7c5a4be2861d8926436ff559f39fb53
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • 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://botokaw.ru/123?utm_term=goat+simulator+trophy+guide+goatville PDF link annotation
    • https://cdn.sqhk.co/tajavujexiz/NigBDkT/88797460734.pdfIn PDF document text
    • http://wulutapebime.getenjoyment.net/kumepuwizuzalinijojif.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/88608989484.pdfIn PDF document text
    • http://fajiriduxir.medianewsonline.com/how_to_update_s8_software.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385214/normal_6051c6ef7d6e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403130/normal_604affca4d6ce.pdfIn PDF document text
    • https://cdn.sqhk.co/nafumozuwe/cS5sjcX/puxifa.pdfIn PDF document text
    • https://cdn.sqhk.co/vevajewez/jj9QyOW/55571074204.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/zutopefazosav.pdfIn PDF document text
    • https://cdn.sqhk.co/morovujefi/fRKjigG/16135212740.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374715/normal_5fc675d2dd255.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/76749017109.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414502/normal_5ff24c87a4a26.pdfIn PDF document text
    • https://cdn.sqhk.co/wazuzofi/aifDkTt/lep_s_world_gameplay.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e5e8ca9-e86d-4720-a4f4-0cc5f5eb5635/57149620884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/663c43e3-e3f6-486d-ad95-48f30e922711/python_3.4_3_for_windows_10_64_bit_free_download.pdfIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/application_deadline_for_texas_am_san_antonio.pdfIn PDF document text
    • http://popofisofol.myartsonline.com/fezekufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ffcca2-e749-47af-ba81-6a759426362f/27480916964.pdfIn PDF document text
    • http://fufudaloxola.onlinewebshop.net/54320071156.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/boy_erased_book_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/155d9997-6785-41a2-bddc-e74a497bef7b/ob_nursing_final_study_guide.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/48656230434.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_off0000fcf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF5 5564 bytes
SHA-256: 44d9308b6247fd75978c9684c887342c12986754b494228df7421002e73975a4
font_01_sfnt_off00010fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC9 11968 bytes
SHA-256: 859debaaefc0433dee1851d456b703f8c559669d41d5a8134c00c95127c16d9e

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