Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5888c5f7287272c…

MALICIOUS

PDF

82.8 KB Created: 2021-04-08 05:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c70cd6b81d3a2f4c7a41a87e1d975b31 SHA-1: 1dc9c6afceaa745f669a2a618e7cae41d4805f69 SHA-256: e5888c5f7287272ccb20cc841084e19d7eab9ab7ec38383050e2871ba6fef3c2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for phishing purposes.

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://jacksth.ru/wix?keyword=protein+synthesis+worksheet PDF link annotation
    • https://cdn.sqhk.co/tofegejij/dAggidU/4312622837.pdfIn PDF document text
    • https://cdn.sqhk.co/gorusuvu/tkgfQjc/boy_erased_a_memoir.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/56b34633-346c-4296-85d3-3213dd9f9447/whites_coinmaster_metal_detector_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61c19a71-679d-408d-8b68-f3c7c017d117/is_barska_a_good_safe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3ca3928-4113-4665-9c12-13b0ea7e56f0/general_theory_of_relativity_meaning_simple.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/15215505168.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/angular_7_format_number_pipe.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/novezuvetawaluxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b2b7397-e462-4b44-a50c-b3d36fe8a522/fry_sight_word_assessment_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/53074456943.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/54053045187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de6bd3c-1130-4a28-89d1-a5fd0c5befaa/why_does_my_space_heater_turn_off.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/11319563386.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/lapemaladokomopodinu.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/beethoven_sonata_4_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/yaara_nal_bulley_song_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/capnography_waveform_interpretation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30a110d8-9f32-4905-bc18-6b0e9b4326e3/la_biblia_catolica_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/addition_worksheets_no_regrouping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cff10a24-3883-48b0-ab8b-72748c329618/edipo_rey_y_antigona_libro_completo.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_off000106b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B6 4792 bytes
SHA-256: 441001fdc7ffbd402302f02c584e28957564c1ba6588ba56eda0c46ac5cdbdba
font_01_sfnt_off00011715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11715 11592 bytes
SHA-256: ea0275ac15cd24dd06a4c743c7f28142e103e361b446ba46d90b7cd68783f4e9

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