Malicious PDF — malware analysis report

Static analysis result for SHA-256 20925c10ed5033ff…

MALICIOUS

PDF

81.3 KB Created: 2021-01-19 06:46:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1da56de82e12101b8f143e66b0478b1f SHA-1: 8fe3b705c905cea78f560a73ef130ee766091638 SHA-256: 20925c10ed5033ff7931a5848140d328025920dfb17b3b39623ad3b62eff3cc6
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=types+of+clauses+with+examples PDF link annotation
    • https://vosaxoro.weebly.com/uploads/1/3/4/4/134469305/9038115.pdfIn PDF document text
    • https://site-1171568.mozfiles.com/files/1171568/52952294694.pdfIn PDF document text
    • https://suzexefovewav.weebly.com/uploads/1/3/4/6/134640410/dejixubijaxa.pdfIn PDF document text
    • https://bikigevoxepasi.weebly.com/uploads/1/3/4/7/134716722/jaxan.pdfIn PDF document text
    • https://site-1171568.mozfiles.com/files/1171568/61422332145.pdfIn PDF document text
    • https://site-1198442.mozfiles.com/files/1198442/86499837257.pdfIn PDF document text
    • https://site-1194807.mozfiles.com/files/1194807/28784170429.pdfIn PDF document text
    • https://cdn.sqhk.co/tamikoveken/BhcVInK/44947311962.pdfIn PDF document text
    • https://jokiputukalak.weebly.com/uploads/1/3/1/1/131164130/komiziguwiz.pdfIn PDF document text
    • https://numuluga.weebly.com/uploads/1/3/4/3/134307024/f66ac63cf51a3c.pdfIn PDF document text
    • https://site-1179199.mozfiles.com/files/1179199/notuxipuluxuxalijedisolex.pdfIn PDF document text
    • https://rizigavitud.weebly.com/uploads/1/3/4/5/134581125/ec457dc8.pdfIn PDF document text
    • https://xorodipilubila.weebly.com/uploads/1/3/5/3/135311864/viriko.pdfIn PDF document text
    • https://site-1246101.mozfiles.com/files/1246101/bulova_marine_star_100m_manual.pdfIn PDF document text
    • http://puwonasomoso.22web.org/22878255874.pdfIn PDF document text
    • https://nifisutabunus.weebly.com/uploads/1/3/4/6/134634245/6acf3deda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jabukejezari.epizy.com/71720443370.pdfIn PDF document text
    • http://binuxusegewake.epizy.com/77980651681.pdfIn PDF document text
    • http://fewuzefar.rf.gd/fazoweve.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A1 5144 bytes
SHA-256: da252d140867b1a65a2126d7ea9d53669881eb9caba506da0ccd68fd45beb61d
font_01_sfnt_off00010752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10752 10236 bytes
SHA-256: b38e7e059e18779b8ee64f77720fedb87dc23144900109bcbec6f99f85277c65
font_02_sfnt_off00012a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A24 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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