Malicious PDF — malware analysis report

Static analysis result for SHA-256 8277dfa46fcb0464…

MALICIOUS

PDF

73.1 KB Created: 2021-04-14 00:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: edc96908558dfd8bd5e3eb2eef613d0e SHA-1: d89f4c0f4e2e1c6f89a4688148f0a780d2dc715d SHA-256: 8277dfa46fcb0464995bd3c6bc11231dcab715afd1bd68013f6ad473c76a75c9
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 0.9997

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
  • 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://xezojetit.ru/strik?utm_term=chaos+theory+movie+ending+explained PDF link annotation
    • https://kudilasiwutoxe.weebly.com/uploads/1/3/5/3/135314551/rubexipose.pdfIn PDF document text
    • http://fastpeysistem.online/starfinder_books_amazonrfrza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387933/normal_5ffb6eca0b531.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490754/normal_6057dced9b746.pdfIn PDF document text
    • https://buzelobuledu.weebly.com/uploads/1/3/1/3/131397981/liwelumijofijug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380890/normal_603ea64274f6f.pdfIn PDF document text
    • https://risonozolediwar.weebly.com/uploads/1/3/1/3/131398017/veker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486192/normal_605259e8376ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443608/normal_5ff4afdb5ef3c.pdfIn PDF document text
    • http://usacreditreport.info/2nd_grade_math3lm9p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418746/normal_5fe004f37fc5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385427/normal_5fe221238377f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378152/normal_6032b0edb9eda.pdfIn PDF document text
    • http://habercigo.com/game_theory_textbooks11ef.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/1fa3c9c9-2b86-48e1-9d32-9db88e25c552/51031034561.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/53336734747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ad930af-d886-4d48-b1b1-034782cddede/dell_t3500_audio_drivers_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cbec5ad-79bb-4002-a37d-dfbd42b68601/what_is_the_purpose_of_supply_chain_management_systems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf41d31a-2336-42a1-b8d1-5b6804a0e6fa/how_to_write_a_business_case_study_format.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/inductive_and_deductive_reasoning_reading_worksheets.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_off0000e1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A6 5508 bytes
SHA-256: c0fe21426f08f6257eaf9f4872fc933cb8a19731ccdaa1bc1ec033a2d51f5cfb
font_01_sfnt_off0000f445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF445 10196 bytes
SHA-256: b095b73ecebc3803cffd02ebcd918366de350b56021e16921c27297e4a894938

Open this report in the interactive analyzer, or submit your own file for analysis.