Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c84df21691db7a…

MALICIOUS

PDF

84.4 KB Created: 2021-02-27 06:19:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae390308bb4a9c28ed7b172eb2f083db SHA-1: 9c0ed40ef11fd2abcda3aa88df87716441bf4093 SHA-256: c1c84df21691db7ad1fbf4b075c74fe9a4dc0d16d725b8287d697cfdc7fce03a
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'vilenefex.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests a lure related to 'blood collection tube color guide australia'. No scripts were extracted, but the presence of an external URI and the nature of the detection suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wix?keyword=blood+collection+tube+color+guide+australia
    • https://cdn-cms.f-static.net/uploads/4369185/normal_60323e94675b9.pdf
    • http://openchambre.xyz/pubajevejkp4m.pdf
    • https://cdn.sqhk.co/guludagew/chjgjbC/sogumitarovizegenutam.pdf
    • https://static.s123-cdn-static.com/uploads/4472506/normal_5fcb5b7fafd67.pdf
    • http://vseti.life/74903115834sxbx6.pdf
    • https://cdn.sqhk.co/barugogip/ZjaxYL8/weather_channel_live_radar_texas.pdf
    • https://cdn-cms.f-static.net/uploads/4445749/normal_600d35bd67fd7.pdf
    • http://woxuruko.medianewsonline.com/19662231013.pdf
    • http://useraisins.pro/what_is_the_integration_of_cos_square_x_dx94qwe.pdf
    • https://cdn-cms.f-static.net/uploads/4417525/normal_6027fb0b5252a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jajuzasalikirut/71358607942.pdf
    • https://s3.amazonaws.com/goviwigax/hp_elitebook_8570w_wifi_drivers.pdf
    • https://s3.amazonaws.com/najubu/82473825809.pdf
    • https://s3.amazonaws.com/wovisak/95451560496.pdf
    • https://s3.amazonaws.com/wegemebufojafak/ocean_basket_menu.pdf
    • https://s3.amazonaws.com/gedesisumi/67387549878.pdf
    • https://s3.amazonaws.com/zuwimadaneb/performance_appraisal_examples_quality_of_work.pdf
    • https://s3.amazonaws.com/povelenavuviw/grid_template_areas_auto.pdf
    • https://s3.amazonaws.com/farezelof/distress_tolerance_stop_skill_worksheet.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_off00010ea3.bin
e1d0a0b4cc4e72118d1b88f3b67d0e1c278286dafc6c1ed3be16d2cf07e09fbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA3 5296 bytes
font_01_sfnt_off000120af.bin
60a3bab05f9f943df94a39da70d0addf3b9214ef53eae5e2a1d9bdf756de51c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x120AF 10236 bytes