Malicious PDF — malware analysis report

Static analysis result for SHA-256 7993aecc59618c59…

MALICIOUS

PDF

106.5 KB Created: 2021-03-04 08:55:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 301fd9e9e444faa7a370aa8e8c27f5cb SHA-1: a1a42e1b736a6e9ecefaf50fdcc96c8b1a957405 SHA-256: 7993aecc59618c59cc143b9ca8a02653b2e9f2b7f2db577d5017bf9e5e24e2f7
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The PDF contains heuristics indicating it is a phishing lure, specifically attempting to trick users into installing a browser update or changing payment details. The ML classifier strongly flags this PDF as malicious. An external URI was also detected, pointing to a suspicious domain that may host further malicious content or serve as a command and control server.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://golowaki.ru/strik?utm_term=actiontec+q1000+firmware+update PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459935/normal_601ffc882e9c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486743/normal_5feb222dd65cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453332/normal_5ff68286c5ea0.pdfIn PDF document text
    • http://zakazuvanadoze.66ghz.com/ap_ssc_marks_list.pdfIn PDF document text
    • http://vostokzapad.su/wixuxasudoxojibawip2dqib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445534/normal_6028a4a88c533.pdfIn PDF document text
    • http://vixitatevejiwo.getenjoyment.net/flowers_for_algernon_theme_song.pdfIn PDF document text
    • http://yewes.fun/cuantas_clases_de_adjetivos_hayr9n6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480580/normal_5fe68cd5601f9.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/jotupizijivakivimuru.pdfIn PDF document text
    • http://swiss-gear-top.xyz/buzega5i2nb.pdfIn PDF document text
    • http://plusstore.pro/pejizipijitavukrmhff.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/sowewazulejewi/15832065479.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/formative_assessment_strategies_for_every_classroom.pdfIn PDF document text
    • http://sikejilewiz.epizy.com/space_encyclopedia_book_free.pdfIn PDF document text
    • http://zujetisapapido.rf.gd/american_standard_furnace_red_light_blinking_3_times.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/xokex.pdfIn PDF document text
    • http://jipowefata.epizy.com/attu_movie_hd_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/jaxaguk.pdfIn PDF document text
    • http://vawerudarasikow.myartsonline.com/bsf_lesson_25_day_3.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_off0001595b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1595B 5492 bytes
SHA-256: 5ed3a1d743849c565da97bcc84d620a59e8f9aa0f9baa9ad4b0de8261192e69c
font_01_sfnt_off00016c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C11 14540 bytes
SHA-256: 1b152a2e8d591143833ac830a8482aa21829180fad641b5031d1812aec601774

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