Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93efb5202fc75d9…

MALICIOUS

PDF

91.0 KB Created: 2021-05-02 07:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6bf02d90192a2856476a46f995e5d6cc SHA-1: 3141f33e733e64518a1da90c228c6b21d4fdb963 SHA-256: a93efb5202fc75d9155789d8bbd54c779464443d41bc5c7d6a2ef50c91e64b8b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to seemingly random PDF files, suggesting a link farm or SEO poisoning tactic. The primary URL, 'https://kuzutuzo.ru/strik?utm_term=how+to+set+up+scarlett+2i2+on+windows', is presented as a guide but likely leads to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/strik?utm_term=how+to+set+up+scarlett+2i2+on+windows PDF link annotation
    • https://cdn.sqhk.co/nukusigemug/sZjdpGl/vikings_war_of_clans_hack_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/suzagofi/jeQ4ieK/26050856716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409425/normal_60419cf3e7957.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491148/normal_5fe151efc23b9.pdfIn PDF document text
    • https://cdn.sqhk.co/fatidizeru/ibgcgeC/simple_present_literary_definition.pdfIn PDF document text
    • http://zekaxezixil.medianewsonline.com/sas_sgplot_bar_chart_color.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415055/normal_5ffe65b88aee4.pdfIn PDF document text
    • https://cdn.sqhk.co/lopijikuvi/jgrwijs/retro_space_war_galaxy_attack_alien_shooter_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_603f284b17a42.pdfIn PDF document text
    • http://kafofal.mygamesonline.org/sexulubekax.pdfIn PDF document text
    • https://cdn.sqhk.co/vovigewuva/khctAhh/police_interview_questions_and_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lokijuronig/android_box_h96_max_update.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/why_is_epson_scan_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/novaxidete.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/34487080950.pdfIn PDF document text
    • https://0dea665b-aaaa-42f3-a52c-f86f0fd1efa2.filesusr.com/ugd/8b9728_18f10dcf90e04ea5ba0132d7dcc6b4d0.pdf?index=trueIn PDF document text
    • https://d7e981a8-8c4a-445e-aef0-60d3d4911bd2.filesusr.com/ugd/65d69c_b3a1e2d14d8a4c6fabf09b63390a6800.pdf?index=trueIn PDF document text
    • https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_c87a23453e074b3a8c9610e58c9851c2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kimone/shield_vector_psd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/value_investing_is_dead_2000.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/niwas_praman_patra_online_form.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11856 5136 bytes
SHA-256: 27bae79ce8228f57f5724e4f4fdac868bb7b2452b66de430ecfe8820e1c9251d
font_01_sfnt_off000129e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E8 11232 bytes
SHA-256: fdd599e3def53b3b6fd50367f5aabba3d584d25f84a352cd38e7305869fec2f9
font_02_sfnt_off00015075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15075 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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