Malicious PDF — malware analysis report

Static analysis result for SHA-256 954c09cd8207643b…

MALICIOUS

PDF

104.0 KB Created: 2021-02-24 04:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 8e0728c4508aff6fe278ae493d4a9b6e SHA-1: ea386346195ad0984221358f7ec591ddb9cef9b5 SHA-256: 954c09cd8207643b564590230e00143dfed492bd14797e278d263846e5a1fe76
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains numerous embedded URLs, characteristic of a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest exploitation for client execution, potentially via embedded JavaScript or other exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=jerry+rice+fastest+40+time PDF link annotation
    • http://classicalnaturally.com/daburewuxemexufejisajremf2.pdfIn PDF document text
    • http://idealslimitalia-official.site/515232522698cgks.pdfIn PDF document text
    • http://reflectionss.space/velifivop5pen.pdfIn PDF document text
    • http://medupaj.iblogger.org/53581667946.pdfIn PDF document text
    • http://creamwalls.online/javemo6lueh.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/atmHxEn/solo_a_star_wars_story_3.pdfIn PDF document text
    • http://lishop.site/758314423503gm28.pdfIn PDF document text
    • http://tugrull.com/305422020073o2e2.pdfIn PDF document text
    • http://proita.space/lemonade_stand_song_2vxk15.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/pjigidE/62503856032.pdfIn PDF document text
    • http://kersita.fun/puzixokuxadesl3fys.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/vigjfyT/derijaneweden.pdfIn PDF document text
    • https://cdn.sqhk.co/vadezewe/gchj6E4/iphone_neon_purple_aesthetic_wallpaper.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lekipuvuji.epizy.com/getetodigolenufowowenigoz.pdfIn PDF document text
    • http://jipudovisubu.rf.gd/banda_calypso_cd_roubado.pdfIn PDF document text
    • http://kogejikez.epizy.com/5073564551.pdfIn PDF document text
    • http://diduwodiwobe.rf.gd/what_is_the_healthiest_pizza_at_dominos.pdfIn PDF document text
    • http://bukaduxanob.epizy.com/lakiwaj.pdfIn PDF document text
    • http://lavuradisaxel.epizy.com/jivizafedafalegulikalejo.pdfIn PDF document text
    • http://gugamofizuxeg.epizy.com/94370811349.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_off000159f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159F0 5316 bytes
SHA-256: a42b1cd11d54754aa167f09353a5b7c63ddba92592753266943e4da54eb1f93a
font_01_sfnt_off00016c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C02 11176 bytes
SHA-256: 32a69ae8a9016ed69155ea27b30c30ff95a1ec1c09e05708b26c1f117576fe7f

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