Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a0d1cbb4971ca9f…

MALICIOUS

PDF

82.3 KB Created: 2021-04-28 19:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f2237fa8314a09ccd8aaf01a2f2858f SHA-1: 2766a8994a502c75e96ca3f5d7ef7db9ba264d3c SHA-256: 5a0d1cbb4971ca9fb3237f866c2bffd08a4e0a86bf0c6f1bcb6a538efe0547d5
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by the "PDF_SEO_LINK_FARM" and "PDF_SEO_DISPOSABLE_LINK_FARM" heuristics. The document body, though heavily obfuscated, suggests a deceptive pretext related to "Kung fu panda cast 4". The presence of numerous external links, including one to "kuzutuzo.ru", strongly suggests an attempt to redirect users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=kung+fu+panda+cast+4
    • https://cdn-cms.f-static.net/uploads/4412174/normal_6016faa234117.pdf
    • http://vemiwegar.iblogger.org/zatomezesotoxud.pdf
    • https://static.s123-cdn-static.com/uploads/4368742/normal_5ff3a0ba184b8.pdf
    • https://pazomanu.weebly.com/uploads/1/3/1/0/131069777/09d050d11521020.pdf
    • https://tefafovok.weebly.com/uploads/1/3/4/5/134588422/dodabitavelosupakag.pdf
    • http://wigewanadowo.22web.org/placental_abruption_acog.pdf
    • https://ropemobajakim.weebly.com/uploads/1/3/4/6/134694841/tuzagawi.pdf
    • https://static.s123-cdn-static.com/uploads/4372753/normal_5fdd22137a99b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_bd03c03a269347db8d29e869c036b7a0.pdf?index=true
    • http://bovapefe.epizy.com/math_worksheets_grade_8.pdf
    • https://19a4122d-28db-4ec2-a9e3-8c1e87f24dd5.filesusr.com/ugd/70d0b7_352ed28a194b4abab18b0979bd3cc828.pdf?index=true
    • http://faputigumajo.rf.gd/73688449708.pdf
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_4d1c70d821c94ad3a02266cf3001417c.pdf?index=true
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_f6c176133dfe4325a62c602954eea529.pdf?index=true
    • https://97d49ff2-d914-4ae4-8ac8-5e5cf5f77cad.filesusr.com/ugd/6350c7_34c032cedb2f48f7a184c2b9e3f3f75a.pdf?index=true
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_81ec2635915149f5a2ec5da086f51dd7.pdf?index=true
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_5ff185d4b5e54aa493eaa72c6a4519f7.pdf?index=true
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_1c11925c89fa423abbf633006f4cec47.pdf?index=true
    • https://aaca6425-83b8-4992-a49d-2ec8a2d61848.filesusr.com/ugd/304e3c_5b1a00861f1e4963ac1f0c90a7e0a8c2.pdf?index=true
    • http://pomababotesu.rf.gd/valkyrie_anatomia_apk_latest_version.pdf
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_ea21561cc76e4833b04ee3938e188937.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010302.bin
22275d88ccb404c11251c63d7cc6720dcb96e50715d29575e31dafe55b5b8fbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10302 5252 bytes
font_01_sfnt_off0001150d.bin
528cf753da898be9475aab9917e1a7972a2666ad3397f714681521e40b78ad04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1150D 11564 bytes

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