Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7af17bcce1e8d63…

MALICIOUS

PDF

67.8 KB Created: 2021-02-04 06:59:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 57d4f16ca9b29b0bccc707f3a41d262f SHA-1: f6ca7099e1f7421e342152babc854c652b3c77d7 SHA-256: e7af17bcce1e8d63c78aaf98fc735ca3e808f18ea0622621b8a41ded8f6b9324
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high number of embedded URLs, many pointing to suspicious or disposable domains, indicating a link farm or phishing attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, but the sheer volume of links suggests a primary goal of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://druttle.ru/aws?utm_term=yeast+balloon+experiment+worksheet PDF link annotation
    • http://detonicro.website/rigibunopomesiniguvn1cx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417220/normal_6008ecbb31827.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373797/normal_5ff319b0a9894.pdfIn PDF document text
    • http://healthit.space/76074937051k9h1a.pdfIn PDF document text
    • http://ipoteka.net/671467816480root.pdfIn PDF document text
    • https://puxipevabama.weebly.com/uploads/1/3/4/3/134308905/6610124.pdfIn PDF document text
    • http://putinoid.ru/one_more_brick_challenge_very_hard_21ayso7.pdfIn PDF document text
    • https://basedupapopulow.weebly.com/uploads/1/3/4/3/134344364/e559d3ffb68290.pdfIn PDF document text
    • http://carinsusa.com/star_wars_jedi_academy_mods_single_playerce3si.pdfIn PDF document text
    • http://tublitalia.fun/burda_patterns_downloadwjuzl.pdfIn PDF document text
    • https://fadufavibog.weebly.com/uploads/1/3/4/8/134889314/2254362a1984.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://ribebipewafiwas.epizy.com/chromebook_shortcuts_cheat_sheet.pdfIn PDF document text
    • http://juxudawalugevop.epizy.com/opening_and_closing_balance_sheet_format.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DC 5172 bytes
SHA-256: 7c009f47e23fbfd40be0a9fbfd96c66b492992a8314cdefbbfd2b19d91fc81ca
font_01_sfnt_off0000d23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23B 9964 bytes
SHA-256: a65b72c5fccd545f918fb0f98a9a4d12b7eec7319fbdf34607ca6ed8c3eec53e
font_02_sfnt_off0000f463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF463 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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