Malicious PDF — malware analysis report

Static analysis result for SHA-256 807f8045515adbe5…

MALICIOUS

PDF

72.7 KB Created: 2021-03-16 02:23:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f8124251cba6a7db72df2d7c0869ad9e SHA-1: 108e166c81ce2bf4748f1e9dc6ef3c7b37debb8c SHA-256: 807f8045515adbe5d6088722a76f72e944cff731ceb0689ac1e4e75799d6b78d
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 0.9992

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://baarspo.ru/wix?keyword=permaculture+one+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393624/normal_6001cef793d1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494166/normal_6038713c9ae15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414491/normal_5ff8f3e12a3e2.pdfIn PDF document text
    • http://vumoramoguko.22web.org/mefezeke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461201/normal_5ff8dbc473efa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420600/normal_5fdde1227db4e.pdfIn PDF document text
    • http://limezage.scienceontheweb.net/atomic_structure_questions_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xunurevi.rf.gd/much_ado_about_nothing_shakespeare_review.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/68699202671.pdfIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_438824c9172b4406b1785d7fbd7dba36.pdf?index=trueIn PDF document text
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_ddcf82e422ef44b68938561567da9d39.pdf?index=trueIn PDF document text
    • http://jodirexefakevub.rf.gd/spreadsheet_api_pricing.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/vijalutenewavurexur.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/53166622325.pdfIn PDF document text
    • http://sirusuve.epizy.com/sofunofe.pdfIn PDF document text
    • http://wifuvonuwoje.rf.gd/arbitration_vs_mediation.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/video_birthday_invitation_maker_app_free.pdfIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_75fad7991d3d4ba495b61d1074d62e28.pdf?index=trueIn PDF document text
    • https://e0529b0e-ffd4-46ae-8a9e-348c3aa8e3ae.filesusr.com/ugd/27320f_f900de316f714ded958f14594f480d45.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/wudeserexugibukovadegowup.pdfIn PDF document text
    • http://kesojavutuv.epizy.com/architecture_residential_drawing_and_design.pdfIn PDF document text
    • http://mojamolo.rf.gd/44471855721.pdfIn PDF document text
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_4d5588ed8592471c88f903248eea7b97.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_off0000df40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF40 5124 bytes
SHA-256: 21e4d94f2cc275399ccd5a945c61466afa6240233f6546c44645dfc0839c7256
font_01_sfnt_off0000f095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF095 10668 bytes
SHA-256: 28a2e4aff50e51a4bc51bfa74721eff66f1c61cf55d1c7107a717efd81ae3a48

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