Malicious PDF — malware analysis report

Static analysis result for SHA-256 49458363062cd174…

MALICIOUS

PDF

72.7 KB Created: 2021-02-28 20:59:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 052c77e9e5b59c41fbf21d5266bb1c3e SHA-1: 6b0c215a60161fae3abf4d9102433c6e05a697c1 SHA-256: 49458363062cd1744357c957ca76b8e5045c02769681f0ca59843c070452801a
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains, indicative of a link farm designed to redirect users to potentially malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the URLs and the PDF structure points towards an attempt to exploit users through deceptive links.

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://mezovuduw.ru/wix?keyword=free+paid+apk+apps PDF link annotation
    • http://ses-sanobrabotka.ru/is_insignia_a_good_brand_of_television7fzei.pdfIn PDF document text
    • https://toxazuna.weebly.com/uploads/1/3/0/9/130969920/5e3a656638b182.pdfIn PDF document text
    • http://ig-objectionform.com/761573226559jcca.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/guest_relations_director_job_description.pdfIn PDF document text
    • https://cdn.sqhk.co/fepexeguma/HihwrJV/pathogen_meaning_in_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/sejiragidu/dhdMiTq/loxetovug.pdfIn PDF document text
    • http://kfcrabota.ru/jio_mobile_ka_video_calling_apps6zxsc.pdfIn PDF document text
    • http://testertumentum.space/6962073120nz9zu.pdfIn PDF document text
    • http://raftgjgr.space/spalding_50_inch_polycarbonate_portable_basketball_hoop_system_assembly_instructionsjad81.pdfIn PDF document text
    • http://sodaapp.club/8223542276hkmp1.pdfIn PDF document text
    • https://piminudoligot.weebly.com/uploads/1/3/4/6/134688392/f07c0861c45.pdfIn PDF document text
    • http://trenketo.buzz/tejonixegivorawodiduxukufzjmj3.pdfIn PDF document text
    • https://mubatizusilaboj.weebly.com/uploads/1/3/4/4/134475350/4b3234f6a040a07.pdfIn PDF document text
    • http://fishing-rods2.club/gibarutebejitijevejawhn61s.pdfIn PDF document text
    • https://latezuletarok.weebly.com/uploads/1/3/5/2/135298634/kanobuvate.pdfIn PDF document text
    • http://kraftmann.su/fesuzevubujububil9g27.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_off0000e22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22C 4940 bytes
SHA-256: 6a83334ef2501360d4ed4eca9ed1a42692cbeddfbdd9fbb55cc0b0f9a9ecf3a4
font_01_sfnt_off0000f30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30A 10212 bytes
SHA-256: dcf740c4554ec5d7892b818340c7f0aa74d372f0da8e203c9cdf3a4af8dcb214

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