Malicious PDF — malware analysis report

Static analysis result for SHA-256 d549c41887dbe8c8…

MALICIOUS

PDF

73.4 KB Created: 2021-02-16 23:13:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c6f32f237045b4bdff0d5f43fc3bc015 SHA-1: 910e17c3b4e11d78f7e19d3c45201b176dfde8d9 SHA-256: d549c41887dbe8c8bad111056769ae6564102512de7f2d005925248715542a4c
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links, pointing towards a phishing or malware distribution scheme. The embedded URL 'https://jottigo.ru/wix?keyword=vectis+prime+eidolon+hunt+build' is a primary indicator of the malicious destination.

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 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://jottigo.ru/wix?keyword=vectis+prime+eidolon+hunt+build PDF link annotation
    • https://cdn.sqhk.co/defisepeniba/fheieig/modern_warfare_3_lane_maps.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/2Lhhehc/jailbreak_russia_jailbreak_escape_from_tarkov.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwoxebu/gcS8ja2/8813825676.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505326/normal_5ff1056c21666.pdfIn PDF document text
    • https://vutavevivusupe.weebly.com/uploads/1/3/0/7/130776898/zorasipitevarida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389095/normal_6025a86fd5855.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_5fd73977d7e80.pdfIn PDF document text
    • https://dibumofum.weebly.com/uploads/1/3/5/3/135313591/zifokulipabavugugi.pdfIn PDF document text
    • https://fuvejewitopi.weebly.com/uploads/1/3/1/0/131070508/2817006.pdfIn PDF document text
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/994122.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383921/normal_5ff4cc0355421.pdfIn PDF document text
    • http://xtw2.club/xelakigokqu9ww.pdfIn PDF document text
    • https://cdn.sqhk.co/pibexezases/gihbASO/hd_camera_software_for_android_apk_download.pdfIn PDF document text
    • http://myyshooop227.site/totelozejorowigegubisuls8020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/36360503.pdfIn PDF document text
    • http://maferodo.epizy.com/biology_dictionary_english_to_gujarati.pdfIn PDF document text
    • http://talakukatutevib.epizy.com/cgl_gk_capsule.pdfIn PDF document text
    • http://timaroxakex.epizy.com/dnd_5e_cleric_spells.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/confidentiality_agreement_employees_template.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_off0000e319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE319 5208 bytes
SHA-256: 11caebd8f32606a1381598c264b4a9e7ba9c46ebf9b4b64cb00e3170705933b2
font_01_sfnt_off0000f49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49E 10508 bytes
SHA-256: f4c30ba2291bb156564d6325c47d912ab7ac382bda06de1d3b79fdc9668e1b69

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