Malicious PDF — malware analysis report

Static analysis result for SHA-256 188ed2b6c6354227…

MALICIOUS

PDF

86.1 KB Created: 2021-03-12 21:05:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f23c281cbb08f9f4140a363ad8aa8157 SHA-1: 296876110cf9391aa11c6d2724e54b268c460159 SHA-256: 188ed2b6c63542273038d0938768b3f6a57b3395eee374491d3e31dc840469e9
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, vilenefex.ru, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to downloads and applications, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/award?keyword=az+900+book+pdf+download PDF link annotation
    • https://cdn.sqhk.co/jogowijalaro/iehiidN/free_modern_cv_templates_for_word.pdfIn PDF document text
    • http://turosofatilez.iblogger.org/gowizewegunabaxodun.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/ifijiam/video_promoter_apk.pdfIn PDF document text
    • http://bestita.space/kirilivsgprm.pdfIn PDF document text
    • http://jobs-ingenieur.best/the_fox_and_the_crow_moral_of_the_story7ay1q.pdfIn PDF document text
    • http://espacecmb.xyz/94341638853k8301.pdfIn PDF document text
    • http://899themes-demo.ru/mathematics_workbook_for_grade_4vw293.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/gejhjhs/79009296469.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/dezajok/begeni_paneli_apk.pdfIn PDF document text
    • http://vabizawez.epizy.com/lofuzuwusegapagudenalizid.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/22781749789.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/saraverovaxekoxabuwu.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/6-5_conditions_for_rhombuses_rectangles_and_squares_worksheet_answers.pdfIn PDF document text
    • http://ximedamolaxeve.epizy.com/71231095857.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/carrier_debonair_220_owners_manual.pdfIn PDF document text
    • http://bowukedogatowo.epizy.com/avast_antivirus_pc_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/free_restaurant_flyer_template.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/how_to_prove_it_a_structured_approach_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/irregularly_spelled_words_3rd_grade_worksheet.pdfIn PDF document text
    • http://tirevotijo.epizy.com/54573550888.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/sebawapujamutuxened.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/commercial_electric_digital_multimeter_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/besluit_kleine_herstellingen.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012831.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12831 20804 bytes
SHA-256: 53804691779d71ba77f5a93b6c6eacc1c946e50fdec05c4f1fc209ca8ae8f2ca
font_00_sfnt_off0000e804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE804 5392 bytes
SHA-256: c20522d7fd44d35a535b4d37eeee62b75ac0ae0fbe56ad684679bf2dcdc91771
font_01_sfnt_off0000fa89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA89 14360 bytes
SHA-256: 9440eb7e7fc18a2288bbd02022bdd89455d9ff7b1bc9d81f50a33c6397372e61

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