Malicious PDF — malware analysis report

Static analysis result for SHA-256 09de429812381baa…

MALICIOUS

PDF

79.6 KB Created: 2021-05-06 03:35:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f47e3b31028c4c704fefe55ba0aeb850 SHA-1: 5c72a8a3cadd08a1d5f2f98eb60301a69c2a4c54 SHA-256: 09de429812381baa4b8f871067d126bf00cb366d1135ec6ca9659ece7d488a17
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 0.9994

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://mezovuduw.ru/strik?utm_term=tintern+abbey+analysis+genius PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476432/normal_600da2e085343.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477655/normal_5ffe8feeb71cd.pdfIn PDF document text
    • http://nafivonafiriba.iblogger.org/lugila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489599/normal_603df8e484049.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415537/normal_60283465caeca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485935/normal_60379051a9c98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_0af6555954164abe90f541549cc22438.pdf?index=trueIn PDF document text
    • http://mezomiz.rf.gd/lks_barisan_dan_deret.pdfIn PDF document text
    • http://xuperag.epizy.com/anganwadi_online_form_in_delhi_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/bunelel.pdfIn PDF document text
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_5fd54c7d1d0141049361b00fde559227.pdf?index=trueIn PDF document text
    • http://xuvanav.epizy.com/sx-70_modification_for_600_film.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/xomigenitugavuxeduvajuvub.pdfIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_b91ba075d55b4791b81e4c92f63545aa.pdf?index=trueIn PDF document text
    • http://magujale.rf.gd/viliwakadumasakupiput.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8611efd-b4d7-4ac0-bdab-35db3942470d/what_does_no_monkey_business_mean.pdfIn PDF document text
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_8f6fc932d0e345a5b6c78406147c4c47.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/66bff92d-db39-4150-90e1-d3b085d6a413/44652977678.pdfIn PDF document text
    • https://0feddc0e-03bc-46a3-a741-45303deff239.filesusr.com/ugd/6ea6a2_57715ceac14a458c9859662d481d2b55.pdf?index=trueIn PDF document text
    • http://jonivobo.rf.gd/microsoft_office_365_outlook_support_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e9f4aa-7005-4f9b-ae83-409773f3f613/infinix_note_5_price_in_nigeria_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbec93c4-9460-4feb-92da-e317d9a54413/cebada_perla_engorda.pdfIn PDF document text
    • http://towawopijoxodor.rf.gd/allahabad_high_court_ro_aro_notification.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_off0000fa66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA66 5044 bytes
SHA-256: 135eb979f57e5a981ff1db6825c1286aec47555ff8958dc40f3276e78cdda12b
font_01_sfnt_off00010b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9F 10940 bytes
SHA-256: 1c2766b5167b7a8467c24711d3d7039bb9d0420c40e99e070d68a9730e2d8a64

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