Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb935097382e4df…

MALICIOUS

PDF

73.0 KB Created: 2021-02-22 00:41:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 3ba1e8ca8bb2a98d643c76ccdc5f509d SHA-1: 20ed3ec475140f17b4112126938e849008fab53d SHA-256: bbb935097382e4dfca12c28801ffca32b2c70ce23d61c8987eb1d85d45b4ff90
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/strik?utm_term=is+the+movie+delirium+a+true+story'. This indicates the document is designed to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=is+the+movie+delirium+a+true+story In PDF document text
    • https://cdn.sqhk.co/gimexigerub/oidgeLQ/58988727776.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/eQjb6gX/what_does_boulangerie_mean_in_french.pdfIn PDF document text
    • https://cdn.sqhk.co/muzorefu/heW2pjc/kubimiretu.pdfIn PDF document text
    • https://cdn.sqhk.co/depivuni/kysfxjh/celebrity_cruises_captains_club_points.pdfIn PDF document text
    • https://cdn.sqhk.co/mekizojo/vjeEWjc/lokekagap.pdfIn PDF document text
    • https://cdn.sqhk.co/wamiratena/hgSmIjf/86518234169.pdfIn PDF document text
    • http://luranowebereni.22web.org/actualizar_android_auto_suzuki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492588/normal_5fd31a9b78429.pdfIn PDF document text
    • https://cdn.sqhk.co/xipovowimugo/fLjjh1S/lenovo_laptops_price_list.pdfIn PDF document text
    • https://cdn.sqhk.co/natokaze/jep9hfn/jawefepo.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/5hiasKc/spellblade_match-_3_puzzle_rpg_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/nomuzali/ymhiihW/packers_schedule_2019_dates.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/00zPgec/notes_apple_login.pdfIn PDF document text
    • http://xakuneferufilew.iblogger.org/calligraphy_marathi_fonts_for_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wukevuwotud.rf.gd/absorber_xl_high_performance_drying_towel.pdfIn PDF document text
    • http://tavaxovowewut.rf.gd/apollo_munich_health_insurance_cashless_claim_form.pdfIn PDF document text
    • http://penalat.rf.gd/basic_english_assessment_test.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_off0000e13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13B 5164 bytes
SHA-256: 32ab9525378481a80675c54ad9135b7fc18b7ec9909eb49faab119086965b5bd
font_01_sfnt_off0000f2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 10540 bytes
SHA-256: dd30066a1577b0c26ad89a6d9640441deb7393297f25cf7e8d38d84585657119

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