Malicious PDF — malware analysis report

Static analysis result for SHA-256 8989c0b519f6cbcc…

MALICIOUS

PDF

74.2 KB Created: 2020-11-25 10:19:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f899a0338b76b620ab39033e93af8eb9 SHA-1: 1d3dc455e3b41a4e7322fcd49f4f4837ba088344 SHA-256: 8989c0b519f6cbcc2c767aa7355b3f43a25df4efadafe078af967062a3df8637
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, including one to 'traffnew.ru', suggesting it's part of a link farm or phishing campaign. The document body, though heavily obfuscated, contains text related to 'kodi' and 'tv guide', likely a lure to direct users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffnew.ru/strik?utm_term=best+working+tv+guide+for+kodi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447097/normal_5fa655b7beefb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f9c1c29d1944.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380527/normal_5f93180c63b88.pdfIn PDF document text
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/nefugomezonilek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369503/normal_5f8e9643711d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470960/normal_5fbc3af7626ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5f875471d8d5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489994/normal_5fada50c366da.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/f9cf51f2-96a3-4f00-97db-d552797ead8f/1257473915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3f23419-7d61-4947-b453-99ae38319dee/48181254721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7c5c921-82c4-499a-9527-c72f288a0871/5781933986.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/87048267812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f31aa70e-0afa-4dca-8ec9-c5928b7075b2/financial_accounting_weil_schipper_f.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_off0000e438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE438 5100 bytes
SHA-256: 15d623e12f2d43e7bf9496820f53fd6fddaa97c0426eb3bc321bf4ca6b0ec900
font_01_sfnt_off0000f5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C7 11100 bytes
SHA-256: 43c82df1c04223c975ca48a972c8b9c665cd01fb189e566e0004ab998d91ee3a

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