Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee84454eda7db93…

MALICIOUS

PDF

74.3 KB Created: 2021-06-14 04:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2ea8a653106b479c2dfd93eccde7e652 SHA-1: d8fea1b4a0f1b09fa31272e92d6db662bad6742b SHA-256: 6ee84454eda7db93cef6f36d10836b1d84dfa40b7df80fa6859b1a77cf06e711
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a significant number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. One of these links, https://krisoc.ru/pbw?utm_term=pubg+mobile+hack+ios+no+jailbreak+2021, appears to be part of a phishing or scam attempt. The ClamAV detection and ML classifier also strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://krisoc.ru/pbw?utm_term=pubg+mobile+hack+ios+no+jailbreak+2021 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4380380/normal_5fca41d3f1975.pdfIn PDF document text
    • https://zedesaxaratok.weebly.com/uploads/1/3/4/7/134733302/xasisivatapajitew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452154/normal_604b37c792bad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372080/normal_60b7aec73699e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421473/normal_5ff367afabaaf.pdfIn PDF document text
    • https://tibijipobarak.weebly.com/uploads/1/3/4/4/134493900/7099211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412890/normal_6025074888994.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379849/normal_60035b1593fa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_60525467efa61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479439/normal_5fe0e9a178f61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386337/normal_5ff09b1914067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381340/normal_604db2456a42a.pdfIn PDF document text
    • https://revokaraso.weebly.com/uploads/1/3/4/3/134320841/e31c870f39f8b.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/38430feb-72e8-4173-9de8-8e0ef9c530fc/pigezugapuxipobit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89c0582b-9996-4cdb-8051-e809b69fa0a6/getewupova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee5eb6b5-2005-4b58-9e4e-d4f869fe48da/47020544330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39d63877-56ad-48af-8a42-c11d9f054568/83892505154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6d974b5-99d9-4e35-8bca-fbf1fabf6d66/is_there_an_app_for_interior_decorating.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c4a00c-19a9-4783-bc28-38b134cda854/24097008788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bfa8a1c-2dcd-4072-83b2-78e895576e2a/animal_farm_chapter_1_questions_and_quotes_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b7dbbbc-cc49-45cc-9b4e-9f07e1ce3727/mikelubuvelojadifunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73d8ce55-3c51-4b6b-8dd1-65d90ca657f3/44722118765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8906a42-31f1-46f4-aa49-9a0756b6ff58/94628985243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8df5b54e-842f-4ba3-9409-2628f1269395/safabilifinaxoponu.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_off0000e3eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EB 5820 bytes
SHA-256: 00f8aac537d8a93595846d4bb495e15baa72bb7b752eee359b4b4c47d572e5f3
font_01_sfnt_off0000f791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF791 10524 bytes
SHA-256: 87c09bbbdfed8a9d7ea285509395952846e92b07bf4e8ddd4a981b4967129b89

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