Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd8d9c3f6144bc7…

MALICIOUS

PDF

75.9 KB Created: 2021-03-22 22:41:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b599e83e7ddc28a1f369709881a45734 SHA-1: 105d31134aba0006452c70bb80e54fe84adca10f SHA-256: 5bd8d9c3f6144bc7ac831cd101e5fb6268c694efa57c421b3be9cfd067c0b205
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=hakko+fx+951+manual+espa%25C3%25B1ol PDF link annotation
    • https://cdn.sqhk.co/porekige/jVEUQpJ/best_minecraft_survival_house_ideas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_600dc401d08ab.pdfIn PDF document text
    • http://zatodawu.iblogger.org/livro_boca_do_inferno_em.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407996/normal_60020ca1b6bbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464861/normal_5ff7c67fa4e16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479688/normal_60561a86a875e.pdfIn PDF document text
    • http://waniruraguxi.22web.org/boards_and_beyond_promo_code_2021.pdfIn PDF document text
    • https://kagepejipewabo.weebly.com/uploads/1/3/4/8/134871264/rewaguka.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/feLlhfn/7738480653.pdfIn PDF document text
    • https://jusopusoguwukul.weebly.com/uploads/1/3/4/4/134494455/6e4d5b.pdfIn PDF document text
    • https://cdn.sqhk.co/savadapo/hbFiaCn/rgb_led_strip_remote_control_instructions.pdfIn PDF document text
    • https://jutokikifugata.weebly.com/uploads/1/3/1/0/131070124/lapirupid_ropis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://770cee9b-59ea-4c2b-ae8d-aad83b0abb79.filesusr.com/ugd/8b25c7_4b5c6ee0006141768d8a1cfd6b4622ed.pdf?index=trueIn PDF document text
    • https://7f2467c6-0d80-4e38-8df7-27624e0b9669.filesusr.com/ugd/e19533_5ec405802b234a27b8f3f6357ee02f77.pdf?index=trueIn PDF document text
    • http://xibiwoziveva.epizy.com/pelivupapokelivagekemo.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/37773539050.pdfIn PDF document text
    • http://kepipejesa.epizy.com/oxford_discover_3_writing_and_spelling.pdfIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_165541a7fdc0472da5a4fcdecf6fc2cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/bheema_song_ringtone.pdfIn PDF document text
    • http://rixijine.rf.gd/xibafukuxiledam.pdfIn PDF document text
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_fa4d5df73bc14a01816fa31b3a46f36e.pdf?index=trueIn PDF document text
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_596232a44cab4493b2ae4f93db663b81.pdf?index=trueIn 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_off0000e669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE669 5588 bytes
SHA-256: 3fe8ce9e407d76660daacbd9b8ad4b83efc8905af9f9bf5fdbd26c21bb7e8bc7
font_01_sfnt_off0000f932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF932 11884 bytes
SHA-256: f57d11908af4a93b168e5d641c2a4f0fdbde72a9948d8486ba1b01754ade36ce

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