Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d4475b1a17a6d1c…

MALICIOUS

PDF

77.2 KB Created: 2021-02-27 05:04:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0b1ce74d873ec79f1eda029828e56d7b SHA-1: 1a1d2a991a09155da0de613406b1284430857966 SHA-256: 5d4475b1a17a6d1c389ee5cd93b38da68d37ec81130536ca26ce1ac8e57af656
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for further exploitation.

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://kuzutuzo.ru/wix?keyword=touching+spirit+bear+cms+answers PDF link annotation
    • http://instapriz.online/jizulek8ttw.pdfIn PDF document text
    • http://zuvomeronimewa.iblogger.org/stephenie_meyer_income.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/0a7e3ae026a56e3.pdfIn PDF document text
    • https://wetejitaxazis.weebly.com/uploads/1/3/4/3/134306742/3502780.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387920/normal_6004592ce4a17.pdfIn PDF document text
    • https://fukopimuwevi.weebly.com/uploads/1/3/5/3/135351499/pajadepamelanur_kajiwixebug.pdfIn PDF document text
    • http://qwertyujg.xyz/kim_kardashian_hollywood_hack_ios_downloadp4109.pdfIn PDF document text
    • http://rijupoxog.22web.org/numodurufukimef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410194/normal_5ff7ba3bbc443.pdfIn PDF document text
    • http://znalomstvavip.site/engineering_fundamentals_design_principles_and_careers5mmib.pdfIn PDF document text
    • https://cdn.sqhk.co/zaborofisi/4jhihuQ/30755136016.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/hie1iiW/fasorapog.pdfIn PDF document text
    • https://cdn.sqhk.co/dekaroku/NPAGje1/civil_war_generals_game.pdfIn PDF document text
    • http://nosagebuki.22web.org/letras_goticas_para_dibujar.pdfIn PDF document text
    • http://creditinquiry.info/sepupikelibekitewed95ezz.pdfIn PDF document text
    • https://cdn.sqhk.co/fakomuse/0lijOiF/business_statistics_and_analysis_coursera.pdfIn PDF document text
    • http://rozivoladavabog.iblogger.org/allods_online_mac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415292/normal_5ff4371fa6a06.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_off0000f3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D2 5496 bytes
SHA-256: 65ee3f2a2209c51f5c13b34ccf7bf3b5f32f514ba1208a828ecdd266043a84a1
font_01_sfnt_off0001066b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066B 9784 bytes
SHA-256: 20f7187b2268f2dc2dde76c03d1caf236c5567272f37c34632799566db17019e

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