Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d8bd7eeb76b63e…

MALICIOUS

PDF

74.5 KB Created: 2021-05-26 23:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a56dafbaa5845a27f1eeca1e61820368 SHA-1: 9bada4a34c36cc7f4e4dc4d38da8c2d1439e1192 SHA-256: d8d8bd7eeb76b63e963ced75115979bb0954284c46c9f8963c4e07e1c60041fe
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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 0.9999

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/strik?utm_term=physics+global+edition.+douglas+c.+giancoli+7th+edition PDF link annotation
    • https://wepebajaka.weebly.com/uploads/1/3/4/5/134588919/muteworatagobas.pdfIn PDF document text
    • https://puzalanenezow.weebly.com/uploads/1/3/4/6/134693659/3257844.pdfIn PDF document text
    • https://gusemotasejodab.weebly.com/uploads/1/3/2/7/132741535/3574912.pdfIn PDF document text
    • https://goradexajegofip.weebly.com/uploads/1/3/0/8/130874122/e300ff58e.pdfIn PDF document text
    • https://pipamoximiketo.weebly.com/uploads/1/3/0/9/130969724/tikojaxelelejad-gavazap-dekakazu.pdfIn PDF document text
    • https://nizufamira.weebly.com/uploads/1/3/4/3/134310662/59004e8bdfe8591.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/0168a2b1-4fa4-491d-85c9-c279b70ae1a7/ti_nspire_cx_calculator_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40dbf968-4368-4728-a9d3-619a0551b10b/vemejewafukiwaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d9ed778-12f2-4a8c-80c6-7437ed8215db/63903200984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99664b8d-203c-4117-bbbc-7c13567c070c/atwood_g6a-8e_circuit_board.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a6d3293-eaaf-4263-b1fd-c731ae993f57/gaxeweje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7836d1b-43b6-4e06-9e0f-3d4f09724d7b/how_to_practice_sword_fighting_by_yourself.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb3bed09-eb59-4b50-b6c4-0e270fa786eb/three_examples_of_project_management_tools.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f91d41ac-343e-4604-a8fc-3aabb6f887c3/degixomelaganu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4e5c346-4d5b-4c53-ac70-13d7538dfb66/13607398537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48e196a3-954c-48bd-8ccf-964f60a02c5c/digagunuvagimebizoworufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0fd64c8-a9cf-42f8-b136-b8646e1b1b4e/sezup.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_off0000e21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21F 5460 bytes
SHA-256: 28e89c4fa1dbe876020e4962a294f83d87e5fed9026e18f90f555f53abaabc63
font_01_sfnt_off0000f4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C0 11252 bytes
SHA-256: 5f5175036d39acbb0ca2ef779799ce2f96b1d9be3aab9c749c37b2ce55f52114

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