Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ef49dd6d0263eb…

MALICIOUS

PDF

83.2 KB Created: 2021-02-24 08:31:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ff5c42be6c1bcd26a9e65b21e6e361cf SHA-1: c1ebf306a1a4ac6a1f5685c6ac3964d75058f273 SHA-256: c9ef49dd6d0263eb4be7ed33e12156bea876b6c679b8a4c1eaca20a37239fd00
104 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains an embedded URI pointing to 'bologen.ru', which is likely a phishing domain. The document body, though heavily obfuscated, appears to be a lure for downloading a driver, indicated by the URL's query parameters and the 'SE_DOWNLOAD_BUTTON' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/strik?utm_term=hp+laserjet+pro+400+m425dn+driver+download+windows+7 PDF link annotation
    • https://cdn.sqhk.co/jurugaguvedu/83jejfk/visofedizexizes.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/gcJnPwx/vocal_pitch_monitor_apple.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/ehajehf/oxygen_sensor_testing.pdfIn PDF document text
    • https://cdn.sqhk.co/dutararopat/eUihuii/live_price_of_ethereum.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/gi0gihf/selipewodozikeliworukej.pdfIn PDF document text
    • https://cdn.sqhk.co/nimuxugemu/jhhiEij/unmatched_air_traffic_control_update_2018.pdfIn PDF document text
    • http://giftcard-sale.store/vazomazur7txt.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/jj2jbji/nobiwokodexajameri.pdfIn PDF document text
    • https://cdn.sqhk.co/safubuguva/jhihQhb/57852610562.pdfIn PDF document text
    • http://basiditdcf.space/powilafipadeparukeguzvor9.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/vojapu/87801901089.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/anno_1404_venedig_crack_deutsch.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/blender_video_editing_tutorials.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/31659831750.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/facebook_er_apk_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/nchsaa_physical_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/teamviewer_chip_kostenlos.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D5 3012 bytes
SHA-256: a399fe96af801c2052f662cdbde4f42b4a683414ee7bc8e1620d29cb9b520efd
font_01_sfnt_off0000ef9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9C 5860 bytes
SHA-256: 85320a97f1d34ee1b7d224cd0626ba724d2ab407636ed08347d2b9615cdb0cb4
font_02_sfnt_off000103a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A2 10980 bytes
SHA-256: 5319c3e491ce9075ac68a30a42c52bf99eb90f7ab98d63cee3df64a2036b2629
font_03_sfnt_off000128d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D2 16328 bytes
SHA-256: 6aea73ff740f54c4554874de6eb31314ca0ac49b4d602ca5c0b1d676e5a0250d

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