Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2bf47fa79e1b205…

MALICIOUS

PDF

77.0 KB Created: 2021-04-22 02:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5ea5253e52b28e178c24d2e30e5f9c50 SHA-1: 566118667570d553c882968f40c17f43153eae58 SHA-256: f2bf47fa79e1b205c8b80827f70e5f5b15278878b95c4f6b1c370afdf6902c43
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 0.9993

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://gimoguvi.ru/strik?utm_term=yankee+doodle+dixie+pdf PDF link annotation
    • http://telovajov.medianewsonline.com/zatewalovipisosujepobebas.pdfIn PDF document text
    • http://vatidenow.medianewsonline.com/lowrance_elite-5_ti_touch_combo_with_chirp_sonar__hdi_transducer.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/sojitegera.pdfIn PDF document text
    • http://wotimose.getenjoyment.net/libepibelowowalutefo.pdfIn PDF document text
    • http://pexawegowe.mywebcommunity.org/que_es_un_bitcoin.pdfIn PDF document text
    • http://jijuduli.mywebcommunity.org/brideshead_revisited_sheet_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480414/normal_6012ac91b31a3.pdfIn PDF document text
    • http://gaximivotekole.mypressonline.com/gofuveninav.pdfIn PDF document text
    • http://zilamuro.medianewsonline.com/92110164149.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393791/normal_5ff105d50e69d.pdfIn PDF document text
    • http://napodosawukezob.getenjoyment.net/kotafuwawemi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470409/normal_605b3787644d5.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/jspdf_add_image_base64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404741/normal_604fae030f528.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gogadotonirad.rf.gd/aviso_de_privacidad_formato.pdfIn PDF document text
    • http://lipabarud.atwebpages.com/quality_assurance_in_pharma_industry.pdfIn PDF document text
    • http://mijekobafenado.rf.gd/sateduzujivedakegajevoku.pdfIn PDF document text
    • http://muwuvago.atwebpages.com/3d_max_tutorials_interior_design.pdfIn PDF document text
    • http://fufabufitilaf.epizy.com/easy_snacks_recipes_in_tamil.pdfIn PDF document text
    • http://nitubak.atwebpages.com/burger_king_application.pdfIn PDF document text
    • http://dolojivek.onlinewebshop.net/notazubajogijiworukud.pdfIn PDF document text
    • http://pegireg.rf.gd/hiperplasia_benigna_de_prostata_fisiopatologia.pdfIn PDF document text
    • http://xekapakifujekem.onlinewebshop.net/plant_pathology_mcq.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_off0000f025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF025 4852 bytes
SHA-256: 7483e9cdd349f1f3550f33a794ab801b48c6fbe5f173272f59ec542b2ffd2f3d
font_01_sfnt_off000100c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C6 11252 bytes
SHA-256: acd5f5b9981aa280e8654e8484f3139dfbfe2eb23be0a659d603d62079d996bb

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