Malicious PDF — malware analysis report

Static analysis result for SHA-256 67726fc012ae5704…

MALICIOUS

PDF

76.0 KB Created: 2021-03-10 15:22:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0646f66bded70ac9c1d17bf2e84dfd60 SHA-1: 6e7777a1da732ead7d1caa226f49284fab59986e SHA-256: 67726fc012ae57047705fc925845be43b4ba2a3b336876e7a2b10f3a107be451
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links disguised as exam past papers. The primary URL, https://lozipotod.ru/award?keyword=o+l+exam+past+papers+pdf, suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/award?keyword=o+l+exam+past+papers+pdf PDF link annotation
    • http://naropiwazufilu.22web.org/69995712362.pdfIn PDF document text
    • https://bifugojatomawak.weebly.com/uploads/1/3/1/4/131437093/nowekivesivan_wekitulamir_jopipisepuvowul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373992/normal_5ff22f5aa2336.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472503/normal_5ff37ac9cdea6.pdfIn PDF document text
    • https://sexevegafuxa.weebly.com/uploads/1/3/6/0/136083832/tijox.pdfIn PDF document text
    • http://gafubejenimefi.22web.org/86132188728.pdfIn PDF document text
    • https://gabukoxikala.weebly.com/uploads/1/3/3/9/133997771/roxemigomuwizive.pdfIn PDF document text
    • https://ripulufixi.weebly.com/uploads/1/3/5/3/135388512/4a2a29b2.pdfIn PDF document text
    • https://maraliva.weebly.com/uploads/1/3/2/7/132712127/resobunog.pdfIn PDF document text
    • http://winnerslm.space/cheek_and_onion_cell_lab_answerskjwns.pdfIn PDF document text
    • http://titoto.xyz/learn_r_programming_language7ga6o.pdfIn PDF document text
    • http://nnorm-id.com/bolizujezoght67l.pdfIn PDF document text
    • http://eglo.club/nitojefaromuviwiwiwlt7xl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_d4743fe3d4794634b5982e873eadb41e.pdf?index=trueIn PDF document text
    • http://juduboferota.epizy.com/91880246440.pdfIn PDF document text
    • https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_94b727b2989e471ca5a554a82b8a9e2a.pdf?index=trueIn PDF document text
    • http://gomupinoteripa.epizy.com/74363157015.pdfIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_d122b41d9d2c4c889c47403817571ec3.pdf?index=trueIn PDF document text
    • https://64f1e6a9-4530-4009-9f9b-67b91dd69f79.filesusr.com/ugd/76b6de_4096638380b241968b0f5400158b637e.pdf?index=trueIn PDF document text
    • http://rubuvajaroxe.epizy.com/cue_file_template.pdfIn PDF document text
    • https://6776ac3f-883f-499f-bc52-38dff818ec46.filesusr.com/ugd/969751_ec87abc17833424dbccc3226e66435e9.pdf?index=trueIn 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
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64E 5280 bytes
SHA-256: f46687c57d3f99789c371e46cbc30a84c0b04f09fa5fef91eed15cf92e301481
font_01_sfnt_off0000e7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EA 8072 bytes
SHA-256: 7b7e61f60f1590b5b0f2b0fa8e85b31b4424ff24ed15aecbd0f849e418cf01f6
font_02_sfnt_off0000ffd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD8 9944 bytes
SHA-256: c4c95ada92a06aff7c8bb0237f3993b6af3db5a169dc22e5756ce135290d31f0