Malicious PDF — malware analysis report

Static analysis result for SHA-256 be57e916f3bb9838…

MALICIOUS

PDF

80.9 KB Created: 2021-03-19 03:49:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: de9302ba7f09d84fa2521ed408779fcf SHA-1: ce3c288a2933aefe54c368d81bd98053b120dc38 SHA-256: be57e916f3bb9838245128b83e0d362dc2fa278365c0d6f27c34318ca1bec1e5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains keywords related to downloads, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wix?keyword=mac+tools+logo+download PDF link annotation
    • http://woziwowariv.sportsontheweb.net/cuanto_es_100_gramos_de_harina_de_trigo_en_tazas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_6015e8768617b.pdfIn PDF document text
    • https://gorokawuse.weebly.com/uploads/1/3/4/4/134489158/3498674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483337/normal_600fb53551e30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402481/normal_5fd039c12e824.pdfIn PDF document text
    • http://waxedeb.getenjoyment.net/zirosefuvap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446770/normal_5fccb751cdb42.pdfIn PDF document text
    • https://fanakigefepawaf.weebly.com/uploads/1/3/0/8/130873796/sivuwusomafesog-femugejidapa-jurodimaral-piloni.pdfIn PDF document text
    • https://ganuzuvotaju.weebly.com/uploads/1/3/5/3/135304652/2132492.pdfIn PDF document text
    • https://kenufipafalenar.weebly.com/uploads/1/3/4/6/134616414/5001d9d8760ecf3.pdfIn PDF document text
    • http://xifasiv.getenjoyment.net/job_contract_agreement.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387718/normal_6053be87cb7bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392199/normal_5fed5f0935225.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393033/normal_6005905534509.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kavezusi.onlinewebshop.net/wheel_of_life_worksheet.pdfIn PDF document text
    • http://napusikut.epizy.com/73737740621.pdfIn PDF document text
    • https://a0e9597c-cfbb-4fc1-b0e0-47ed6411b148.filesusr.com/ugd/24269e_e92d5d825e994eb08504df0fcfdf1d4c.pdf?index=trueIn PDF document text
    • http://dizakopalelur.epizy.com/59672102950.pdfIn PDF document text
    • https://033a7475-7ccb-45c1-8f1e-38fd320d48d0.filesusr.com/ugd/03a576_59950c67ed0449e1b80290ea254a2e1a.pdf?index=trueIn PDF document text
    • http://sugimukijofi.rf.gd/storyboard_template_print.pdfIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_7ea224950d70412cac5cfde2e0588236.pdf?index=trueIn PDF document text
    • http://rogomore.myartsonline.com/11031428298.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_off0000ff6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6D 5108 bytes
SHA-256: a25a26e53da4004fc9e118f6ac649ea443e93b4d6c5bdf133045c8624943fa45
font_01_sfnt_off000110f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F7 10960 bytes
SHA-256: d31bc896fcbf9603a93d6c2d2c1ba63b87b6fddae1eb536ef95ffc194b805534

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