Malicious PDF — malware analysis report

Static analysis result for SHA-256 b260dc88df70cbaa…

MALICIOUS

PDF

89.2 KB Created: 2021-02-15 02:56:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cc4d518b94e04793f63a609fc1e60fd7 SHA-1: 2a902ab62ad150a35e33a1818ca5f6f7ab073b7e SHA-256: b260dc88df70cbaae788ed38800f426e0381a2f6ab61273ea62ff6ccad573c24
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The presence of a visual download button and an external URI pointing to 'baarspo.ru' suggests a phishing attempt to trick the user into downloading a malicious file. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/123?utm_term=balboa+vs500+manual PDF link annotation
    • https://cdn.sqhk.co/lewiwifo/0gh1Agj/69564552679.pdfIn PDF document text
    • http://dezurifu.iblogger.org/college_calculus_textbook_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/jggiUGY/missing_persons_band_words.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/rjbigZy/commander_s_intent_army.pdfIn PDF document text
    • http://gerisekazaleg.22web.org/example_conclusion_for_chemistry_lab_report.pdfIn PDF document text
    • http://dajugolita.22web.org/browsec_premium_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisunez/jbihKgc/47101784127.pdfIn PDF document text
    • https://cdn.sqhk.co/nomowaxiwo/hYL2hdL/shadow_of_shinobi_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gewanunu/cjaQjhN/bewajejifudezidatef.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/f0iiihO/91703432239.pdfIn PDF document text
    • https://cdn.sqhk.co/bibobovezave/fexoibd/splash_ocean_sanctuary_wiki.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/kezemiradigu/free_ccna_exam_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/20022852999.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/quirky_synonym_formal.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/blackberry_link_for_pc_z3.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/jesepanexiregi.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/6607231832.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/game_dev_tycoon_mod_money.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/xafonidigixebuma.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/alberta_education_diploma_forms.pdfIn PDF document text
    • http://ruxurosagogaru.epizy.com/angry_birds_free_for_ipad_1.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/65737724358.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/18481475534.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_off00011e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9D 5252 bytes
SHA-256: 06193ecc69bef7eaa113179e7223832877f7ec4daf7a894ba4213d8e42307818
font_01_sfnt_off00013071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13071 11580 bytes
SHA-256: 5a3fda44c33b77cf29442b6517c5de23b2bc6280f177ac4000296abf99a70f6a

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