Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e63f8c69c0db02…

MALICIOUS

PDF

82.3 KB Created: 2021-05-15 02:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 650bdb050d596771aef6b45bd367a775 SHA-1: 66318428659fcea95feaf177c1bc98b33e70aba7 SHA-256: d4e63f8c69c0db02ad66c44e719d3fe68d034b6d279de1ec47f0d7a448f5c72d
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm used for phishing or malware distribution. The document body, though heavily obfuscated, appears to contain keywords related to product replacement, likely a lure to encourage users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/strik?utm_term=dsc+pk5501+battery+replacement PDF link annotation
    • https://kelogukagikuval.weebly.com/uploads/1/3/0/7/130739039/mefevarimowofobep.pdfIn PDF document text
    • http://xewuxufulizifu.22web.org/nonverbal_communication_in_different_cultures.pdfIn PDF document text
    • http://tiktoktop.design/paninipuke5xa1b.pdfIn PDF document text
    • https://tasepatoravolun.weebly.com/uploads/1/3/4/3/134352318/poxavonetifixib.pdfIn PDF document text
    • https://wowobomufib.weebly.com/uploads/1/3/0/8/130874304/a0da2f3bce.pdfIn PDF document text
    • http://fringigejy.site/xinugujuwamumapufu3q28k.pdfIn PDF document text
    • http://tugrull.com/28908360779d9gop.pdfIn PDF document text
    • http://cetakchantek.com/maigret_in_montmartre_cast93eyc.pdfIn PDF document text
    • https://votujejigep.weebly.com/uploads/1/3/1/3/131380583/vuvedotefav.pdfIn PDF document text
    • https://miletotafog.weebly.com/uploads/1/3/4/7/134758503/fokakapobuw.pdfIn PDF document text
    • http://melidagerukebel.sportsontheweb.net/the_5_minute_journal_barnes_and_noble.pdfIn PDF document text
    • https://figagukedeliv.weebly.com/uploads/1/3/4/0/134040575/josifatimolarunaw.pdfIn PDF document text
    • https://sapemeke.weebly.com/uploads/1/3/2/8/132814969/potepitisebol.pdfIn PDF document text
    • https://nigukaxo.weebly.com/uploads/1/3/1/4/131453065/kofogigozu-kobujuxuwup.pdfIn PDF document text
    • http://euroshopmn.space/368149388249icse.pdfIn PDF document text
    • http://juzikukunekaki.22web.org/weber_q_cooking_recipes.pdfIn PDF document text
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/tudabo-gitejiwo-bemagufamezem.pdfIn PDF document text
    • https://zujujogonawanuk.weebly.com/uploads/1/3/4/8/134879196/2362889.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://balubusepebibi.rf.gd/bandicam_pro_free_for_pc.pdfIn PDF document text
    • https://bb0106b8-f3e0-414b-a873-a0e24df3f2ad.filesusr.com/ugd/b84a33_d764755a22af4c829285af71bd878dc5.pdf?index=trueIn PDF document text
    • http://nisetekotixob.myartsonline.com/avaya_2420_digital_telephone_user_manual.pdfIn PDF document text
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_c659725367cc4e77829278fd840c6807.pdf?index=trueIn PDF document text
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_39700fa9ed2a4243840f42ead8313dfe.pdf?index=trueIn PDF document text
    • http://zaduzos.myartsonline.com/o_reilly_introducing_python.pdfIn PDF document text
    • https://a1b876fd-e98f-4594-996d-fc523792ae9e.filesusr.com/ugd/efcbf0_e3d64bccc90d4e2796192e5c9a605ae0.pdf?index=trueIn PDF document text
    • https://b7c6a474-53ed-4139-af63-4b2f501ae0e7.filesusr.com/ugd/e87294_b379325546e94d198b766cb1bb108937.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EE 5332 bytes
SHA-256: 424afe63f347ab01482725c095d6738935dbf5ce608c2f249875823dda599b6f
font_01_sfnt_off00010703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10703 10692 bytes
SHA-256: fe1abc6d47dc583f0d6b81527bb1a3c74c8062a9586ea025ceae6a4d9be798c9
font_02_sfnt_off00012ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA2 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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