Malicious PDF — malware analysis report

Static analysis result for SHA-256 b484ba310fee7b98…

MALICIOUS

PDF

80.4 KB Created: 2021-05-10 22:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a15936c592efc4104792a3e53a917e64 SHA-1: e36b69c3ca987a0f5f390280861e4bbd96fd27aa SHA-256: b484ba310fee7b988aeade466cf2c04b382db1f2abab3283bf77eab552e832ef
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, specifically flagged as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains text related to a video game walkthrough, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jottigo.ru/strik?utm_term=dark+souls+remastered+xbox+one+walkthrough PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377102/normal_60623212019e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379855/normal_60634bd311ff5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499999/normal_605d7d95df9f4.pdfIn PDF document text
    • http://best-ital.fun/carol_of_the_bells_pentatonix_audiof0ghf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379849/normal_5ffbe8aa4fd78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409811/normal_60078a29a2631.pdfIn PDF document text
    • http://cocobuka3.xyz/what_discounts_can_i_get_with_ebt_card1lly8.pdfIn PDF document text
    • http://myfavoritesun.xyz/what_is_forbidden_knowledge_in_frankensteinhlz7r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388271/normal_605ffb7666249.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465151/normal_5fc9c07783f66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393893/normal_60143b9a4aac5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/lexus_rx_350l_2020_review.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/41297495365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd6a87a3-f2a8-4ff4-949e-db984767afb3/is_twilight_on_hulu.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/chal_chaiyya_chaiyya_chaiyya_chaiyya_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/minority_report_2002_subtitles.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/30187841709.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/57214771548.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/fiori_guidelines_smart_table.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/44563535931.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/wow_wotlk_blacksmithing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/lamborghini_song_imran_khan_mr_jatt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fa6803e-ddaa-4aef-9439-e427a268cf4b/descargar_la_culpa_es_de_la_vaca_para_nios.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_off0000fc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC63 5604 bytes
SHA-256: f1dc164460a2296b6d7bcca9805a3b47079207110683880b4d59238ba0f4dfc3
font_01_sfnt_off00010f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F62 10872 bytes
SHA-256: 11ef9c6e7b3484ab7e3655a7cd0404f2aa9c6efe55f954e29fe8e6ae78932d66

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