Malicious PDF — malware analysis report

Static analysis result for SHA-256 70af319385f754c0…

MALICIOUS

PDF

76.5 KB Created: 2021-02-15 12:28:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f520b02ca41423923b0b5729df76df01 SHA-1: 8906fba8f24ba4b9a6efbbf090393342386dea1d SHA-256: 70af319385f754c06b39056fd3a8c6417fdd9ea908b7bf39f1df0fbb2a35afea
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to various domains, many of which are identified as link farms or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of this document being used for phishing or distributing further malicious content. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the document's structure and embedded links suggest an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=casio+gold+calculator+watch+philippines PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377115/normal_6010a317216df.pdfIn PDF document text
    • http://biggymstoe.com/bounce_tales_java_appxh6mk.pdfIn PDF document text
    • https://cdn.sqhk.co/depifozopupe/i0hjYjh/como_se_dice_virosis_en_ingles_hola.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/bipabozapadunopazimenuq2y5e.pdfIn PDF document text
    • https://cdn.sqhk.co/lovojekaboxi/iigiidZ/zgirls_3_furies_guide.pdfIn PDF document text
    • https://gizigega.weebly.com/uploads/1/3/3/9/133999267/gusowogazixetu_topozodarom_xukujepiroj_wibeku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471488/normal_6026eae1f1378.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485435/normal_5fec936eb94dc.pdfIn PDF document text
    • https://cdn.sqhk.co/josutupamav/6hagggl/speedy_cash_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407316/normal_6004b2cab34e0.pdfIn PDF document text
    • https://ketadamofexawun.weebly.com/uploads/1/3/5/3/135349072/1cce5fcb8c.pdfIn PDF document text
    • http://itasummer.fun/citicoline_and_piracetam_tabletsz6il4.pdfIn PDF document text
    • https://cdn.sqhk.co/loberutebe/gu4Q3gc/best_pickup_truck_2019_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/poxosafixe/idZhjhj/77629019596.pdfIn PDF document text
    • https://cdn.sqhk.co/dafisuwikib/Oibiahg/waloma.pdfIn PDF document text
    • https://cdn.sqhk.co/zeboxuze/mDgj4jd/mexican_ice_cream_near_me.pdfIn PDF document text
    • http://priz24.site/dipudedexajatutujgt318.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BF 2888 bytes
SHA-256: adf32003828e0940dd70a9ab198bdbf787bfce6d516b45b646911e816e1ab742
font_01_sfnt_off0000ec07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC07 5332 bytes
SHA-256: 4669e1a8654d78c1fbfb8acb1effb76b79eb198294938eaf81102636185c62a4
font_02_sfnt_off0000fe2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2D 11316 bytes
SHA-256: 54d3dfc58a775da7fd97de271c3419f192d8ca7efb68b335e1dc7893b7c926ba

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