Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e96f800ba147756…

MALICIOUS

PDF

68.8 KB Created: 2020-11-24 14:17:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 73c75e9d37c43345e506b76aaf2eaeb0 SHA-1: cf6d53e266855b228bf72159a895bfe1ef581ffc SHA-256: 9e96f800ba147756928e43e9703d35c126882e6735b54a2608099c81e9d11fa5
284 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains a social engineering lure, instructing the user to install a browser extension or update to view content, which is a common tactic for credential theft or malware delivery. It also hosts a link farm with numerous external PDF links, some pointing to known malicious redirectors and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • 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://traffking.ru/aws?utm_term=who+viewed+my+profile+free In PDF document text
    • https://birobidusizal.weebly.com/uploads/1/3/4/6/134638138/8351192.pdfIn PDF document text
    • https://rinavotonig.weebly.com/uploads/1/3/4/4/134477757/goxewapekuvima-zolepaguw-diwavu-vosadokobal.pdfIn PDF document text
    • https://vatunumorese.weebly.com/uploads/1/3/4/8/134866462/popafifitezixifulet.pdfIn PDF document text
    • https://vuxojamobepu.weebly.com/uploads/1/3/4/3/134333522/8d75d5c36.pdfIn PDF document text
    • https://pomitowu.weebly.com/uploads/1/3/4/3/134389192/821bd331a28c559.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467560/normal_5fb3c94463962.pdfIn PDF document text
    • https://vujanakisa.weebly.com/uploads/1/3/4/4/134401771/dawivabo_ketoworepumaz_darevigunix.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/bce90c71-abeb-4279-bb68-fd640ff52fa3/bleach_soul_resurrection_xbox_360_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a539d84e-346d-4c00-b5f7-517a73c96c26/castle_on_a_hill_lyrics_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3aeb664-47fb-4ee5-91fa-42c514f9067f/vakofozel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67efd859-8e79-41b3-83b7-2c0c149e9766/extend_time_to_answer_complaint_nj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9211512-19e4-4d54-bbd9-849fb703a9f8/3678721412.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_off0000cff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF3 5160 bytes
SHA-256: 68fdf6e0983060b60717ced6ecf0a53ac56064d6f96fe3dafe4d83d06bbcdfda
font_01_sfnt_off0000e179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE179 11080 bytes
SHA-256: 6806a41c3742a807728542a55133451b426409ee985eba4db481e7e75cc73ca3

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