Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6bf6841a4cbcc1e…

MALICIOUS

PDF

69.3 KB Created: 2021-04-30 03:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a511843e42c3446eb529e50d009bcd70 SHA-1: 22cc8113229868997f35ebba47f44eccddbbb4d2 SHA-256: f6bf6841a4cbcc1e89d14f66a660ebe5735f517e8e94b955079e50fca2b0f945
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URLs strongly suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/strik?utm_term=mackie+mix12fx+specs
    • https://cdn.sqhk.co/motanunika/1piaGii/smartphone_tycoon_2_mod_apk_unlimited_research_points.pdf
    • https://cdn-cms.f-static.net/uploads/4410954/normal_601b4cbf367aa.pdf
    • https://cdn.sqhk.co/galemojubemo/hhUnaoW/tapioca_boba_tea_near_me.pdf
    • http://pogawubujogeje.mypressonline.com/past_simple_and_past_continuous_tense_worksheet.pdf
    • http://zosazufinur.mygamesonline.org/alimentos_con_calcio.pdf
    • http://mufutekuson.getenjoyment.net/42655505173.pdf
    • https://cdn.sqhk.co/bexefoboxevi/mYibhgD/telugu_horror_stories_to_read_online.pdf
    • https://cdn.sqhk.co/xolizoxime/nHhzFid/report_littering_singapore.pdf
    • http://xasodizuloled.iblogger.org/dafitibos.pdf
    • https://static.s123-cdn-static.com/uploads/4420752/normal_60011eb10f337.pdf
    • https://cdn-cms.f-static.net/uploads/4367301/normal_600b647280c52.pdf
    • https://cdn-cms.f-static.net/uploads/4414360/normal_604014de6f0d9.pdf
    • https://cdn.sqhk.co/fezivabuja/ihUhcnR/57333116234.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://womejus.rf.gd/39600127697.pdf
    • https://s3.amazonaws.com/dexodekelaseki/breville_smart_oven_air_fryer_accessories_nz.pdf
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_28a8edd598bf4710abd1b2919fb3ebe1.pdf?index=true
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_155b22c11d9644268bb27eaa3f506f2f.pdf?index=true
    • https://4ab51db4-2ab9-4ce7-8cf9-a7235cd4f8a6.filesusr.com/ugd/c6359c_11a3d9390a2049e59b69300dcd6f7c64.pdf?index=true
    • https://s3.amazonaws.com/tetenifeme/adverb_quantity_french_exercises_with_answers.pdf
    • http://xupofajotel.rf.gd/lomulijemijotoxab.pdf
    • https://s3.amazonaws.com/lodazojamuva/the_lottery_by_shirley_jackson_story_summary.pdf
    • https://s3.amazonaws.com/tarajix/paint_shop_pro_free_full_version.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c59b.bin
da6f6d4eec8870b56806b1c5db692879541500ee566e994af18a713bb103f942		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC59B 4844 bytes
font_01_sfnt_off0000d62c.bin
60a8752e96e8c5fb2afa911d0a84a25d9087913b19ee160a8cb130548a19612e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD62C 10356 bytes
font_02_sfnt_off0000f996.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF996 4324 bytes

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