Malicious PDF — malware analysis report

Static analysis result for SHA-256 f615f86838820d96…

MALICIOUS

PDF

79.2 KB Created: 2021-04-17 05:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d516600cd6eac7517b881b5e1230695e SHA-1: 287b0d9dd1de6a9a4553aba6294eaeca5e92e6c1 SHA-256: f615f86838820d96e6b8bd7733b029512318021419609b578924afc1e7e7683c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a search result for public speaking skills, likely to trick the user into visiting a malicious site. ClamAV and an ML classifier flagged this PDF as malicious, indicating a phishing or trojan payload. No scripts were extracted, but the presence of an external URI and high detection scores suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/strik?utm_term=how+to+improve+public+speaking+skills+in+hindi PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417045/normal_5fe17453218d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465392/normal_601eab35537bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367296/normal_6003a5ca5e7e9.pdfIn PDF document text
    • http://matimomewojime.mypressonline.com/oxidative_stress_in_cancer_aids_and_neurodegenerative_diseases.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451217/normal_5fd9e9a79a664.pdfIn PDF document text
    • http://topafigo.mypressonline.com/6094248193.pdfIn PDF document text
    • http://bosuxezaxad.mypressonline.com/35957996698.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/6538793.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pujirageg/10038993452.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/46442198449.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/python_shell_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/2005_jeep_grand_cherokee_check_engine_light_codes.pdfIn PDF document text
    • http://kuwijiti.myartsonline.com/mugilegepaxuzugiteda.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/what_are_the_symbols_on_a_multimeter.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/25118143490.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/how_to_reset_adt_dsc.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/salunapavap.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/camry_xse_2020_features.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/fumudenodijexuwim.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/what_do_godparents_have_to_do_at_a_catholic_baptism.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/articles_on_swot_analysis.pdfIn PDF document text
    • http://sorisavitekinuj.onlinewebshop.net/carmina_burana_orchestra.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/42855083312.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/fewelebezogevupebatoni.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_off0000f7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F8 5804 bytes
SHA-256: 3239ed1522247f5ad2ce32e4c03c6e5512b3c40d9f0e5a1e3b59f588355944bc
font_01_sfnt_off00010b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B94 10496 bytes
SHA-256: 9dbee68fdb34e367e6cfe59fd6007f362000c82a7c47772742b69c2ea62aa2cc

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