Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd4c4a3241dabad8…

MALICIOUS

PDF

77.1 KB Created: 2021-02-07 13:39:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 760784bb98aac41b3fe8595dcc6603a4 SHA-1: 3cb9ca753c6b6a056f6fa5f67bd3f26a0a79e1a8 SHA-256: dd4c4a3241dabad800857e7017d87ef9c6e9ab9498802f7ff6cd372fd57a0139
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'SE_INVOICE_LURE' suggests a phishing attempt related to invoices or payments. The presence of multiple external URIs, many hosted on disposable domains or link farms, indicates a likely attempt to redirect the user to malicious content, potentially a second-stage payload or phishing site.

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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=at+period+end+brandon+company+estimates+that+%25241200 PDF link annotation
    • https://kirorasonosa.weebly.com/uploads/1/3/4/7/134743937/8b98bbe.pdfIn PDF document text
    • https://kumumejetosen.weebly.com/uploads/1/3/0/9/130969188/ca7b72c7afd280.pdfIn PDF document text
    • http://sethel.xyz/bezefawojuzp5e32.pdfIn PDF document text
    • http://zatoboyvibor.fun/cambridge_igcse_chemistry_study_and_revision_guide2y8sy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463788/normal_5ff03ab42ae8f.pdfIn PDF document text
    • http://betflixguvenilirmi.com/police_wireless_sound_mp3_free_downloadga898.pdfIn PDF document text
    • http://grantmedica.ru/20729449526tp1if.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371807/normal_600fa35abfb34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387702/normal_5fd1c10fec6f1.pdfIn PDF document text
    • http://ipatovaalena.ru/62817108088rrcyv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409123/normal_60184353bfb25.pdfIn PDF document text
    • http://azorocheat5.xyz/reasoning_question_in_gujaratiyqx3z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477139/normal_5fc9e93330b7a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/dokukujabunep.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_off0000eeb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB8 6076 bytes
SHA-256: 56bb1ddd135e2d77d45b785736f3fd4f5515c9ac5476503c562d6b72b580fb41
font_01_sfnt_off00010346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10346 10500 bytes
SHA-256: 33160202a2313c30cb52a05631f13b3f61bf44e964fc4a8d1b166ebe3a4cacc2

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