Malicious PDF — malware analysis report

Static analysis result for SHA-256 f14b3a608454a3d1…

MALICIOUS

PDF

75.8 KB Created: 2021-03-24 14:57:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 94d3278f1c7b220f842bf11a2298c366 SHA-1: 25a788f9a9bef9b95601387320ecace485b7c038 SHA-256: f14b3a608454a3d1d149556c950d9d899c15457af7b273076be1b012d55e367f
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a heuristic indicating a visual download button and an embedded external URI pointing to a suspicious URL. ClamAV detection and ML classification strongly suggest malicious intent, likely a phishing lure to download a secondary payload. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, which can be used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=logitech+wave+keyboard+manual+k350 PDF link annotation
    • http://nutesane.iblogger.org/literature_review_on_chrysophyllum_albidum.pdfIn PDF document text
    • https://cdn.sqhk.co/tejikeluz/O8hh8he/69070208967.pdfIn PDF document text
    • http://xiselegudiwip.iblogger.org/77263443004.pdfIn PDF document text
    • https://cdn.sqhk.co/lewiwifo/gfhcQke/choi_game_brain_test_online.pdfIn PDF document text
    • https://cdn.sqhk.co/bogebumemilo/hgifJgg/does_music_increase_productivity_at_work.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/gimisorixosu/la_leccion_de_august_personajes_libro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb8c3e30-c0eb-4e30-bc6c-1f6b91ca0df2/isabel_allende_city_of_the_beasts_series.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/gukagabonufavurirajev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45f2db6-45c7-49eb-a0d9-62b47c774e5b/best_books_to_read_on_product_management.pdfIn PDF document text
    • http://gutotoluderivi.rf.gd/jokigibu.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/devovisudafakumuxebetakik.pdfIn PDF document text
    • http://jariluwalube.epizy.com/beyonce_coachella_performance_lovelyti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6a295d0-2262-40f8-927a-003416411e3b/51663599877.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/fiwugewenapofeso.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/how_great_thou_art_lyrics_methodist_hymnal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51e78be2-48f1-44ef-a1ab-2c40fd65efb8/which_statement_best_expresses_the_theme_of_the_short_story_harrison_bergeron.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/obtaining_police_report_nsw.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/fukadutapu.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_off0000d8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DA 5884 bytes
SHA-256: 6b40a44ee5cec31d3e6de0c004c053f93a8c55d56191e7a4e99149a3323f714e
font_01_sfnt_off0000ecdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDD 10924 bytes
SHA-256: 91068e23194af96270c4c78239b38b121c9e5df3586d6e750cff7cab99ed6bbb
font_02_sfnt_off0001124d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.