Malicious PDF — malware analysis report

Static analysis result for SHA-256 f945a9975aaf3bc3…

MALICIOUS

PDF

75.5 KB Created: 2021-03-17 00:19:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 058c923514ad05cda9da5606ad6ef243 SHA-1: 07de5283158b501ceb0a11fea910201ef22529a3 SHA-256: f945a9975aaf3bc3c7175729dc835925f13710bcff13358730e305c9618b2336
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://mezovuduw.ru/123?utm_term=wondershare+mobilego+full+free', which is likely a phishing or malware distribution lure. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the presence of the malicious URL strongly suggests a phishing or credential harvesting attempt.

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://mezovuduw.ru/123?utm_term=wondershare+mobilego+full+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365613/normal_5fddfb1c66d6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365646/normal_6004854c3e9fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401985/normal_600c227cd2893.pdfIn PDF document text
    • http://sisowim.iblogger.org/facebook_lite_apk_android_2._3._6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491445/normal_5fc56e6553b94.pdfIn PDF document text
    • http://mowisadewojapu.22web.org/mass_flow_rate_formula_thermodynamics.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/fc718dc0-5ddc-4c17-b366-1e191c2d780d/gre_math_formulas_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfcafc72-8cbb-4025-8a56-6c0a89e1d802/dell_latitude_e6540_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edcb687e-7fe1-41ed-87b4-b26ee7170896/principles_of_electronic_materials_and_devices_4th_edition_solutions_chapter_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b748a546-aa84-4587-9dde-5a757e89bc74/fufemimefokiweboragisivux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/854ff5d2-6738-4b5a-857f-31cb1ad386f5/40275715495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e86f7df0-0ccf-4240-9af0-c92bb7edd16b/why_is_my_paint_spray_gun_spitting.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/ximosili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/409e20cf-bfb1-4c9d-ae72-25d3ef891ea6/what_is_the_color_code_for_a_250_ohm_resistor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbee85f2-a02e-440d-b406-7f992e6a03ab/setting_bollinger_band_untuk_scalping.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/77633575396.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/68401087865.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/evangelios_apocrifos.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_off0000e96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96F 5476 bytes
SHA-256: 976ab920ba2c4ae72e0ab8587b180201339b220b978d1dba044ef058f0b14114
font_01_sfnt_off0000fbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF0 10832 bytes
SHA-256: e39f51e6651595157d088703673f8a9a3dc6e83ec36ecca28575ae4688494e11

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