Malicious PDF — malware analysis report

Static analysis result for SHA-256 d781b9baa4a40d78…

MALICIOUS

PDF

82.7 KB Created: 2021-04-16 00:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 437e3fe919249c5a3be70a2d7615f7b9 SHA-1: e7c990b9a90bf74b00d5c0e315ca78ec806fe8ac SHA-256: d781b9baa4a40d782f505894e0e2759349a2ac9bca6cf082aeb1091599c5952a
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a malicious domain. The document body, though heavily obfuscated, suggests a lure related to "free tarot reading books". The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing or malware payload via the external link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=free+tarot+reading+books PDF link annotation
    • https://cdn.sqhk.co/vigeroti/vjggejf/sdge_power_outage_twitter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373986/normal_606eaad34bad8.pdfIn PDF document text
    • http://dawavuwera.22web.org/envato_powerpoint_templates_for_free.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/UQfMrTd/vokalizoma.pdfIn PDF document text
    • https://cdn.sqhk.co/xejadukoxeta/bljdgHw/raxufimatuni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402032/normal_5fea149182510.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417024/normal_603446a967ea7.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/hjhdBih/best_offline_gps_navigation_for_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413587/normal_6066b9372da5a.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/hcifzbO/26233131953.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403680/normal_5fcba7b943d24.pdfIn PDF document text
    • http://gugudavi.22web.org/kaba_ilco_locksets.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gelawiweza/86256890852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/615df5df-198a-4ef1-a835-add6b7df9452/oracle_pl_sql_developer_salary_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/zavojubebojujuxilumirezi.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/insect_body_parts_worksheets_for_grade_1.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/kejufirosudogonaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/bingo_song_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba19dd35-899c-4862-a644-e89c0a714cee/18331914841.pdfIn PDF document text
    • http://warufadul.rf.gd/hcc_placement_test_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/nanezafevevonojuso.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/dragon_ball_z_manga_full_color.pdfIn PDF document text
    • http://wikeratofi.epizy.com/jarojujiluza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7836d58-c600-46b1-a9a4-f7300e9333b0/figexenoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e439db67-1b23-4d4b-ae46-578a9af2748c/86173689986.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0C 4908 bytes
SHA-256: cf11b4f283fb69be7666d6237b1b609e2d32011b4218bf8b542abc76216068d4
font_01_sfnt_off00010bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC7 10344 bytes
SHA-256: a855f4a0ca1f13391ef7d72c059d94f16532cf9aceca0cc4a3787d145d4cd39d
font_02_sfnt_off00012f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F25 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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