Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b8269db09549da…

MALICIOUS

PDF

84.9 KB Created: 2021-03-14 23:39:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e8c148462a92f9b036d45333a8fc3df SHA-1: d7e0846ace5f0bfb0e1f253d5ff9f7be0bea7171 SHA-256: d5b8269db09549daaa002907e4a7ba95f4dcde2cfe6b78f958b33564c4c45a7f
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an embedded external URI pointing to a suspicious domain, and it was flagged by a machine learning classifier and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to 'Auvio wireless headphones manual', suggesting a phishing attempt to redirect users to the malicious URL for potential credential harvesting or further malware delivery.

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://soxebez.ru/wix?keyword=auvio+wireless+headphones+manual
    • https://cdn.sqhk.co/toxinize/edqigk7/maxagusawulavuxupobag.pdf
    • https://cdn.sqhk.co/mapetidul/1iew0hc/wixadesotixakigizixinivot.pdf
    • https://cdn-cms.f-static.net/uploads/4368488/normal_602ee2404d9af.pdf
    • https://cdn.sqhk.co/vavapezami/gfgjNgg/cardiovascular_pharmacology_for_nurses.pdf
    • http://sawemawe.mywebcommunity.org/adventure_tourism_activities.pdf
    • https://cdn-cms.f-static.net/uploads/4488558/normal_604333e61d8bd.pdf
    • https://static.s123-cdn-static.com/uploads/4453108/normal_5fcfe70201775.pdf
    • https://static.s123-cdn-static.com/uploads/4380214/normal_5fefe73a1ed03.pdf
    • https://cdn-cms.f-static.net/uploads/4474220/normal_602d4704c00ac.pdf
    • http://mujabelor.mywebcommunity.org/t_maxx_2.5_rpm_skid_plates.pdf
    • https://cdn.sqhk.co/getabemuto/yPiiiiB/minecraft_story_mode_cast_season_2.pdf
    • http://gaxesujite.medianewsonline.com/dojavinar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bavatesivo.myartsonline.com/taranis_qx7_battery_charger.pdf
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_d2e3dc38c7b54a2c8103e76d8a8256b5.pdf?index=true
    • https://s3.amazonaws.com/tubukeganuji/bebize.pdf
    • https://1c985592-4fe2-425a-b8d2-7dc24782370c.filesusr.com/ugd/a13bc2_b571e730140840e3abeddcbabcbe9948.pdf?index=true
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_9652566d919a4d25a1ccd5c825444dde.pdf?index=true
    • http://kawerulim.onlinewebshop.net/how_to_get_soundbar_to_work_with_tv_volume.pdf
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_6e80d3e650db4cd59b61fcbdd82df0f9.pdf?index=true
    • https://s3.amazonaws.com/boduxatavepe/petepalip.pdf
    • https://s3.amazonaws.com/lerezazo/adilakshmi_purana_movie.pdf
    • https://933afb0c-60ca-4ff4-ba38-e7c804ca925d.filesusr.com/ugd/941881_4dbaa2fe036040bcbc016a57bbcf58aa.pdf?index=true
    • 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_off00010f64.bin
d6bd4c135fc9fdcb30585c4159cfed58093b8d30856ed3c1aeada2041cf2ef03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F64 5340 bytes
font_01_sfnt_off00012174.bin
298151080db9ffde01a6a405d85e02b8380217e7a60479eef19f2ab6a4e28940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12174 10768 bytes

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