Malicious PDF — malware analysis report

Static analysis result for SHA-256 033fd91ed18822d5…

MALICIOUS

PDF

81.4 KB Created: 2021-04-15 21:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4dd0445909c641dae255e209f4de17d8 SHA-1: d43d95f1249a65a58d599023122951c921da53b4 SHA-256: 033fd91ed18822d5a50fe03afeee45522d8ec96a0151e838885400ef43aa6d7c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

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://kuzutuzo.ru/strik?utm_term=how+to+use+a+copper+moonshine+still PDF link annotation
    • http://siwupojotuj.getenjoyment.net/62667762557.pdfIn PDF document text
    • http://crystal-light33.ru/what_are_some_good_deep_conversation_topicsmiyrs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448110/normal_6031dfa5e189d.pdfIn PDF document text
    • http://istra-backwater.ru/5631097089509g6h.pdfIn PDF document text
    • http://jajuviramigawo.medianewsonline.com/vetozaxuneturuvowuratofe.pdfIn PDF document text
    • http://vk-settings-change.online/horus_heresy_siege_of_terra_book_3zxvwj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484376/normal_60069b3452684.pdfIn PDF document text
    • http://chestlune.online/96227812627vs0bs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458849/normal_60542dfe60ae0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461511/normal_606569e4e7491.pdfIn PDF document text
    • http://ninomut.sportsontheweb.net/why_does_my_lg_tv_screen_keep_flashing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384831/normal_605d912b85737.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://xologikaju.atwebpages.com/what_is_the_theory_of_universal_gravitation.pdfIn PDF document text
    • https://7f1888b6-cdab-4603-9914-1cf81a8b29aa.filesusr.com/ugd/6846fe_a48437cd8e224689b2b11edff483b9f9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdfd91df-d837-456b-a23f-3db638178438/does_ps3_controller_work_on_ps4_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03367c98-b3c9-448d-bd8a-35811218cb1f/39642085345.pdfIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_4c987a05b1ba47ddba82886d110561dd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/291a8a67-7e72-4116-9dc6-6072d3b82eb4/analisis_desde_el_jardin_jerzy_kosinski.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf07bf8d-e5f8-4e81-baa5-15297f6aedc8/kinobody_diet_example.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 6

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_off0000f2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C5 5108 bytes
SHA-256: 6ad9eba138f54f36f5db1364e04eb5607735a18d01bbbe802b6b55656441deb9
font_01_sfnt_off000103fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FC 11448 bytes
SHA-256: 8e7d3cb6621b9cbf13e95465618868f8c875166c81be46db72d77777da7b29e0
font_02_sfnt_off00012a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A55 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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