Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f24fa2f55c5c8a…

MALICIOUS

PDF

77.5 KB Created: 2021-04-03 16:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57ca3695e6391eb5f0166beea798f46b SHA-1: d9f1ab04cab06e58e4f2bb2383070455db98c77b SHA-256: d6f24fa2f55c5c8aea6192cbeea61116f8f9509f1aa30139a5def621b95d2dc6
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://soxebez.ru/award?keyword=i+capture+the+castle+book+pdf', which is likely a phishing or malware distribution lure. The document body, though heavily obfuscated, suggests a search result context for a book, reinforcing the phishing pretext. No scripts were extracted, but the presence of an external URI and the overall malicious verdict strongly indicate a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=i+capture+the+castle+book+pdf
    • https://static.s123-cdn-static.com/uploads/4476595/normal_5fc6cd3a0c84c.pdf
    • https://cdn-cms.f-static.net/uploads/4475391/normal_5fd280187c8e0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fejififimaketo/arelik_klima_kumandas_android.pdf
    • https://s3.amazonaws.com/nilititonawafim/polaroid_template_print.pdf
    • https://uploads.strikinglycdn.com/files/4c356274-6a42-4b15-a2fd-add42a896af3/why_is_my_kindle_not_updating.pdf
    • https://s3.amazonaws.com/dorobukasawituw/how_to_use_my_verizon_phone_as_a_hotspot.pdf
    • https://s3.amazonaws.com/bulalowisu/tuberculous_pleural_effusion_case_report.pdf
    • https://s3.amazonaws.com/loranoduzuja/xotige.pdf
    • https://s3.amazonaws.com/lusegokaves/bakukage.pdf
    • https://s3.amazonaws.com/kovezodepugov/expressions_and_equations_6th_grade_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/3ebf4c92-a55c-4ac9-adab-dd257fde2042/97494689518.pdf
    • https://uploads.strikinglycdn.com/files/308eb04e-f46a-4a25-ba9a-bc22b4a81025/importance_of_form_and_space_in_architecture.pdf
    • https://s3.amazonaws.com/bewibiwat/78581298181.pdf
    • https://s3.amazonaws.com/towutoginadivu/iyena_lyrics_video.pdf
    • https://s3.amazonaws.com/magapeguwabe/adhikaalai_nilave_song.pdf
    • https://s3.amazonaws.com/gajakelegeza/aceable_level_3_chapter_2_answers.pdf
    • https://s3.amazonaws.com/kovezux/xasesojujerusegotej.pdf
    • https://s3.amazonaws.com/sepovutapakogaf/what_are_baby_billy_goats_called.pdf
    • https://uploads.strikinglycdn.com/files/942c544e-de71-4feb-97e6-c07e499e5906/where_can_i_throw_away_my_washer_and_dryer.pdf
    • https://s3.amazonaws.com/bulolimepol/honda_125cc_dirt_bikes_for_sale_near_me.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f260.bin
72ec44f141afd21544ccc942ed7a8e7dc586ffaafc4d8b8a2cb3628f329397be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF260 5384 bytes
font_01_sfnt_off000104a4.bin
d783643c6737ea2633e6cbe98080f281eed2a6927c76e8606e84f491877839c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104A4 10604 bytes

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