Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d90cdc3e3a87258…

MALICIOUS

PDF

76.9 KB Created: 2021-04-20 04:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6bc5f14675b5b367988704c344e21ab1 SHA-1: ef1de7b9d9affa10f7470fe651ab6b27a02a1a62 SHA-256: 8d90cdc3e3a8725890fcea4ed23a84d6d08bdd53fb83efb7d5d1d6c42cef3363
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely used to host a phishing page or download a secondary payload. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the malicious URL strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=will+grayson+will+grayson+main+characters PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365619/normal_5fee0e1e868ef.pdfIn PDF document text
    • https://cdn.sqhk.co/jezofadu/fhg39ib/tanks_gg_wt_auf_e100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489992/normal_602469c9e6fc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421336/normal_60105e6a1b55e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382780/normal_6068cd8442ebb.pdfIn PDF document text
    • https://cdn.sqhk.co/zojoguxuban/CljjmF2/que_es_virosis_en_ingles_presente_simple.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370737/normal_6047ddf8bbcfd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422373/normal_5ffd9b1f340b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452851/normal_5ff7c95c1ad93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465402/normal_5ff067aaa9f2b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/129f291e-2009-46c1-a847-bf9d57d8bd89/surah_yaseen_beautiful_voice_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/138ea4c6-8d29-4405-b354-1f34bc81a67a/how_much_does_chick-fil-a_pay_16_year_olds_in_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a7fd241-ce83-412e-9ac7-3349f28ac6cd/73229958844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0d7dab5-de40-4fd4-a9e0-c84351af995e/bilibizopebezofabaxelobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94614039-ca97-4946-ba79-f5aaa851ba48/john_deere_265_mower_deck_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52fab136-5b10-497b-8ef3-f4f0c0c11256/casio_g_shock_5255_ga_150mf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee29ab9-516c-4aa9-9702-9b16dcf1a406/pokemon_sun_moon_guide_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd837201-312f-4f48-9433-613a2eac4713/nikon_p510_red_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dad0adc5-aa50-4991-a1ac-e22797e2f17a/how_can_i_learn_self_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/949ee985-329c-4937-8da9-006986113095/how_to_reset_my_health_o_meter_scale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c62a443-444a-4caf-8ab6-e6f4be54e216/novinugexexatumobe.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_off0000eeec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEC 5420 bytes
SHA-256: 0a44d797fbecb41112bcdc623f6be398a6a5788e8b595316bd34c139b18a554c
font_01_sfnt_off00010151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10151 10720 bytes
SHA-256: e4354f10d555657dad3f7be746feeb4aeefa0cee227e45cd72db28855fb15804

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