Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf1a4b333704490…

MALICIOUS

PDF

80.7 KB Created: 2021-03-28 11:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42030185517e5f4e0c5c36afb52f210e SHA-1: 95bbb214cb233f445224bab62a276c19436057b3 SHA-256: baf1a4b333704490d065c9b7fd7c711ab95a8f9612aeebab033ba94ad4358689
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a "download button" heuristic, combined with an embedded external URI pointing to a suspicious domain, suggests a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall pattern points to a malicious download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/wix?keyword=stars+above+pdf+google+drive
    • https://cdn.sqhk.co/ripowusaro/fQghx7N/exact_audio_copy_installation_guide.pdf
    • https://cdn-cms.f-static.net/uploads/4369930/normal_601ba91057e35.pdf
    • https://cdn.sqhk.co/ladetozuxi/YIT7ijZ/ainslie_school_uniform.pdf
    • https://static.s123-cdn-static.com/uploads/4489263/normal_6009286890475.pdf
    • https://cdn-cms.f-static.net/uploads/4427103/normal_6045886b45712.pdf
    • https://static.s123-cdn-static.com/uploads/4412408/normal_5fe0e3117ee66.pdf
    • https://cdn.sqhk.co/letarezetap/6hdigjb/calligraphy_fonts_free_marathi.pdf
    • https://cdn.sqhk.co/mofosalamo/hdicChb/16927203436.pdf
    • https://cdn-cms.f-static.net/uploads/4421940/normal_6013b9d3ecf1d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c978ef16-6db8-48f9-af49-dd275082d121/yamaha_rx-a830_factory_reset.pdf
    • http://nifibomagogov.rf.gd/why_wont_the_brush_spin_on_my_shark_vacuum.pdf
    • https://uploads.strikinglycdn.com/files/774154d4-5324-4c79-9e3b-21a05e5033c8/the_cosmic_perspective_8th_edition_answer_key.pdf
    • http://kobepok.epizy.com/multiplication_table_worksheet_1-_12_blank.pdf
    • http://nabapuxamiluj.epizy.com/chrome_browser_win_7.pdf
    • https://08f84d9a-a880-4217-b4f3-956a60fe6fc5.filesusr.com/ugd/b3318b_762eb68a96b04081b555cc3183cc2c1d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5413bd24-4c3f-40d3-bc5d-52a4e909b774/why_wont_my_samsung_smart_tv_not_connect_to_the_internet.pdf
    • http://laropijodozu.epizy.com/borderlands_the_pre_sequel_athena_guide.pdf
    • https://uploads.strikinglycdn.com/files/a6285600-e143-4d7c-8c87-534af367cc9b/does_tone_it_up_app_work_on_ipad.pdf
    • https://uploads.strikinglycdn.com/files/77d2c2b4-8917-4b81-b36c-c68b4b70a451/hp_6500_printhead_cleaning.pdf
    • https://6f1239e7-da96-47bf-8adb-22d47a96a9da.filesusr.com/ugd/bb5a15_ab8b37779e4b4b5894e61941e45f7009.pdf?index=true
    • http://pudosuvosav.atwebpages.com/nufoxiwumebosipovesurabo.pdf
    • http://pimoxonevuwewax.atwebpages.com/20614020334.pdf
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_6e5c32c446ab4ce0bc5ce56c0ecf6073.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe3f.bin
4efe734ae70a3c1e728166774eac739d4ac6e6214596749949bf62a0310d2f7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3F 5512 bytes
font_01_sfnt_off0001110e.bin
70955b5305171d376838ceb56a8243e2ffbb625c104f9084b9b3279c9826c3f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1110E 10636 bytes

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