Malicious PDF — malware analysis report

Static analysis result for SHA-256 9672c89647e937e6…

MALICIOUS

PDF

79.1 KB Created: 2021-03-30 02:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9706c50c693c5f0c62b74c79cb6d13b9 SHA-1: eb2d422e997eb647b4dfa2bd195867475e9fb768 SHA-256: 9672c89647e937e6699312c01cd4bc8f3cc83bca3f8e36ab5427d677a1e4b840
134 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, with one prominent URL suggesting a lure related to 'changing cloud settings'. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into downloading a secondary payload. No scripts were extracted, but the overall structure and heuristics point to a malicious document designed for user-initiated download of malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=how+to+change+my+cloud+settings PDF link annotation
    • http://zesegalos.scienceontheweb.net/brunner__suddarths_textbook_of_medical-surgical_nursing.pdfIn PDF document text
    • http://umdtheatre.ru/biwikikebefag4gu7c.pdfIn PDF document text
    • http://kaxavetaxudu.mywebcommunity.org/55022033222.pdfIn PDF document text
    • http://mimivudarevi.scienceontheweb.net/surenasejuxul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466166/normal_5fcabc7e0e506.pdfIn PDF document text
    • http://pupapumibe.sportsontheweb.net/cargo_tracking_system_project.pdfIn PDF document text
    • http://wubewaxipezopi.22web.org/43754074486.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/25977828242xo2bq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407784/normal_5fec8a1b079ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449992/normal_5fca77275185b.pdfIn PDF document text
    • http://zaxegod.getenjoyment.net/cirrosis_hepatica_alcoholica_nutricional.pdfIn PDF document text
    • http://mimisijuz.mypressonline.com/83567882284.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/lelad.pdfIn PDF document text
    • http://mevixonur.mywebcommunity.org/microwave_spectroscopy_applications.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421042/normal_603a45110bd22.pdfIn PDF document text
    • http://espaceabonne.com/duderakemwts6q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duxepivol.myartsonline.com/annamayya_movie_songs_lyrics_in_telugu.pdfIn PDF document text
    • http://pekiluji.atwebpages.com/87463560850.pdfIn PDF document text
    • http://vitewunidamol.epizy.com/3201165086.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/blades_in_the_dark_portugues.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/vomaxase.pdfIn PDF document text
    • http://tibutariwu.myartsonline.com/barycentre_maths_1ere_s.pdfIn PDF document text
    • http://dovagoxaluzof.rf.gd/82295218908.pdfIn PDF document text
    • http://nuzavaxevarap.epizy.com/battle_royale_free.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_off0000f37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37B 5412 bytes
SHA-256: 9a58900851dbfc27e2cfa710f7173de96e313641a26636116250a4f3c0b0b1b7
font_01_sfnt_off000105d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D9 11368 bytes
SHA-256: 3da6cc2bac3b9b7a3ac86f1eaaba612714c8ca43820698ee38bdd47e7ddd9fae

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