Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d25570e01a46301…

MALICIOUS

PDF

77.5 KB Created: 2021-04-04 21:20:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 900e749dab3c329e7f2ddd332474a45e SHA-1: 1875b3ad87cda5a69b019c9971b42a7958c03a0a SHA-256: 7d25570e01a463017746fc8ed99b03578cfad423d9da6a41d0dd1348915dce91
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 0.9997

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://vilenefex.ru/aws?utm_term=how+to+critique+acting PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417128/normal_605e11fb576b3.pdfIn PDF document text
    • http://nuverlites.online/35865877606xs2p5.pdfIn PDF document text
    • http://xagakojitogiva.getenjoyment.net/barron_s_ielts_listening_test_2_included.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450870/normal_5fdb3d5c58000.pdfIn PDF document text
    • http://zikizitepef.iblogger.org/wendys_burgers_uk_near_me.pdfIn PDF document text
    • http://jakivuxevova.22web.org/domain_driven_design_eric_evans_portugues.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/part_time_graphic_designer_salaryfrb6u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404953/normal_5ffe2aa8d00cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453754/normal_5fff032510e12.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/58234399373.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392872/normal_5ff4daf486a30.pdfIn PDF document text
    • http://mabojexovepa.22web.org/iliad_fagles_hardcover.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476577/normal_60047b6823f41.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/30704246100.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dukerorute.epizy.com/phantom_of_the_opera_script_andrew_lloyd_webber.pdfIn PDF document text
    • http://daximogosamov.myartsonline.com/artocarpus_lakoocha.pdfIn PDF document text
    • https://034618a9-9b39-4f41-ad18-95bca1d1c80b.filesusr.com/ugd/48d9a1_b468509678124f57bde45a8967010b8d.pdf?index=trueIn PDF document text
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_6be035010fc3481fbe4377e9c8611b0e.pdf?index=trueIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/48052908678.pdfIn PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_bbf87eedbfa14b2582ab5a8c59054ddd.pdf?index=trueIn PDF document text
    • http://pibasas.epizy.com/gluten_free_snack_foods.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_off0000f49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49E 4936 bytes
SHA-256: 3675f7a5a4b7e948b4513d7b32b1c41cf92043765605dc9282073fc235044ba5
font_01_sfnt_off0001058c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058C 10352 bytes
SHA-256: 284a39a0ddeb5429899df911d3cc1de792ab19bedc4b095034e26509e1ad1940

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