Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffae3d97d84f284b…

MALICIOUS

PDF

74.5 KB Created: 2021-02-24 12:18:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9869576fa7440d9fd111d2da26524e5c SHA-1: c85589de2cb56c610d5d69b5690f7e8e24fc2bb8 SHA-256: ffae3d97d84f284b2fe1bf434ff91287d8a6ecbc3b1246576370bf1e8e5007c6
186 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 0.9998

Heuristics 6

  • 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.
  • 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://crophysi.ru/strik?utm_term=how+many+has+covid+killed+worldwide PDF link annotation
    • http://byseles.xyz/95489176006bb5ev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455660/normal_6022067de38a9.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/xDBii8n/tropicool_roof_coating.pdfIn PDF document text
    • http://summerita.fun/connect_directv_to_internet_without_connection_kit1ntmh.pdfIn PDF document text
    • https://rilemiwekeb.weebly.com/uploads/1/3/4/5/134599700/mojelumupud-fekim-nuputokew-tafapiju.pdfIn PDF document text
    • https://joripirido.weebly.com/uploads/1/3/0/7/130776040/risaponixipuxu.pdfIn PDF document text
    • https://cdn.sqhk.co/dimumaneda/Qhchajg/caption_for_pic_with_boyfriend.pdfIn PDF document text
    • http://bettermoneytips.com/we_will_be_or_we_are_going_to_bejy8v0.pdfIn PDF document text
    • http://umdtheatre.ru/56919477742kvyag.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/iif9ifZ/28550232125.pdfIn PDF document text
    • http://pedalini.club/hasbro_game_of_life_online_unblockediehxj.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/b9ijZhb/71418540600.pdfIn PDF document text
    • https://kuxelozipapim.weebly.com/uploads/1/3/1/8/131871637/6001733.pdfIn PDF document text
    • https://cdn.sqhk.co/vofaruvukuk/jhbz5Hz/binonojupuminu.pdfIn PDF document text
    • https://cdn.sqhk.co/rabuvimi/jjyZ6ge/46709816249.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419826/normal_6002565a94af2.pdfIn PDF document text
    • https://luwagibefex.weebly.com/uploads/1/3/5/9/135966535/fobunelirulise.pdfIn PDF document text
    • http://com-signto6.xyz/9619317778v2wyx.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/jhck8Ts/gomala.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F0 5460 bytes
SHA-256: 3c8a41a1da49d84695ce9afa805d087c148daa3d6cf8cd9d96772a926f0b931b
font_01_sfnt_off0000f76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76B 11008 bytes
SHA-256: 2c4dc14ddce4da9a1ae8b5d87949db83de6e371bfd67d0450741cb771013eb5c

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