Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f99301a9c84e1a…

MALICIOUS

PDF

75.7 KB Created: 2021-05-01 06:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cb0a8bc372bb0d754b00dbbfdc0d1e98 SHA-1: 0931c65384d7b458b79b3f9b2279a085c7e88d26 SHA-256: e0f99301a9c84e1a49629a62683decaa1e6fcacc48647eed8565242e2245ae88
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://maypoin.ru/strik?utm_term=5+percenters+nation+of+gods+and+earth PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423752/normal_6047c2f42eab5.pdfIn PDF document text
    • http://trysucre.pro/61332585903au6au.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460972/normal_6028e7be94cac.pdfIn PDF document text
    • http://fc-aromat.ru/conversion_gramos_a_tazas_azucar9dlde.pdfIn PDF document text
    • http://senteber.site/minn_kota_battery_charger_3_bankp9xj2.pdfIn PDF document text
    • https://zujefimobob.weebly.com/uploads/1/3/1/4/131453463/1749764.pdfIn PDF document text
    • https://bivesazi.weebly.com/uploads/1/3/4/6/134652180/7746586.pdfIn PDF document text
    • https://menolalosixoj.weebly.com/uploads/1/3/4/7/134714047/xikonewasa-xojapovikujij.pdfIn PDF document text
    • https://panikudar.weebly.com/uploads/1/3/1/4/131437701/jituxidukav-xasud-dovata.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375210/normal_5feee97c1f015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410018/normal_6053252b34a7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387224/normal_6060231300145.pdfIn PDF document text
    • https://judirarizase.weebly.com/uploads/1/3/4/6/134645007/4bfb7a2fcae594.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7ae774ad-b64d-4473-a0b1-aa0db1e39e83.filesusr.com/ugd/3e7897_270a6056f24e402e9ed86e04b36b31b2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/voxulija/85938145385.pdfIn PDF document text
    • https://d0275d90-c5b4-4c72-b581-d0e2b62fc6dd.filesusr.com/ugd/ee54da_517871284ec04f729fd67f95079ee99d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zugutixe/wuxopigonure.pdfIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_7e074ad376744f93b08f7746d2492bd5.pdf?index=trueIn 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_off0000ea80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA80 5412 bytes
SHA-256: c26664369814d9381393d70a79bb59856caa4c2de3106269aeff3c2f0094bfb7
font_01_sfnt_off0000fce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE2 10708 bytes
SHA-256: a1d3b6d122a578a843f1892e17ba48342385a9f19c145b43a408dcbbd4c02966

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