Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f97be0388211762…

MALICIOUS

PDF

78.1 KB Created: 2021-04-10 00:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 71ce2d922e97b4ace6c7ed09c51db767 SHA-1: 2f297a930c2e9c69f750d53eb7f08785916b3817 SHA-256: 6f97be0388211762879b5fb4f3c8c86d84f679ff780a15b0feb66660f4cc48fa
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'vilenefex.ru', which is likely a malicious domain used to host phishing content or distribute further malware. The document body, though heavily obfuscated, references 'Haruki Murakami 1q84 book 1', suggesting a lure to entice users to click the malicious link.

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://vilenefex.ru/strik?utm_term=haruki+murakami+1q84+book+1 PDF link annotation
    • https://cdn.sqhk.co/xiladuxe/getof9F/siren_head_wallpaper_hd.pdfIn PDF document text
    • http://13millions-warzone.store/xuvazi0vayh.pdfIn PDF document text
    • http://nosatines.mypressonline.com/dumalefiwifakoz.pdfIn PDF document text
    • http://dutov.org/lancet_infectious_diseases_case_report6u8mg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402964/normal_606e98cb816cf.pdfIn PDF document text
    • https://cdn.sqhk.co/xevezele/NiatUhg/manualidades_con_botellas_de_plastico_y_foami.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/lJjarhg/27505155657.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417824/normal_60264ab66fc4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_5fd0ad9028989.pdfIn PDF document text
    • http://c-advance.space/112584308613ull1.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/1hc9TM7/hiking_moffat_tunnel_colorado.pdfIn PDF document text
    • https://cdn.sqhk.co/faruzikako/hioOchi/82526076126.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/garmin_vivosmart_3_charging_issuesaw3f8.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/lewuli/18652108734.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/how_to_get_in_lacrosse_shape_fast.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/email_writing_formal_and_informal.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/creative_powerpoint_presentation_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/xamagibujegoxesavijaj.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/jeruzebunirunaz.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/72403831797.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/tojuxor.pdfIn PDF document text
    • http://romofimor.onlinewebshop.net/19082952953.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/istikhara_dua_meaning_in_hindi.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_off0000f54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54E 5244 bytes
SHA-256: eb93366db85143ae90c0dd0d532d18935595a74ccbdb87b3efde5a86a480fbf9
font_01_sfnt_off0001071f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071F 10536 bytes
SHA-256: 339b3afaf8b2cf40fc6b84a05f95abf912859ecbfa2aadbcd066d3fe205ae91d

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