Malicious PDF — malware analysis report

Static analysis result for SHA-256 291b2d2bcfa5bbab…

MALICIOUS

PDF

100.8 KB Created: 2021-03-27 10:50:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cae2495ddf54acd2f99d5f8be239406 SHA-1: 2a397e9a49b8de22ad8fe05cd990cfc7077720f2 SHA-256: 291b2d2bcfa5bbab70f0711a50d86007e4bea36cf42a996998a0498ea5427a2f
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, which is likely a phishing lure. ClamAV also detected it as a phishing trojan. The document body, though heavily obfuscated, suggests a movie title, reinforcing the phishing pretext. No scripts were extracted, but the presence of a malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/strik?utm_term=fifty+shades+of+black+2016+%25D8%25AF%25D8%25A7%25D9%2586%25D9%2584%25D9%2588%25D8%25AF+%25D9%2581%25DB%258C%25D9%2584%25D9%2585
    • http://rakukoke.22web.org/rifipitujipusemurole.pdf
    • http://wokulorumal.iblogger.org/xesivivegimajidajelikerij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rakimeramut.epizy.com/vivaldi_browser_free_for_windows_xp.pdf
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_eb120ce22c7d4d229a13ce91c8acd690.pdf?index=true
    • http://puxujedupis.epizy.com/foporiz.pdf
    • http://genufewewirim.rf.gd/cbr_test_lab_report_conclusion.pdf
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_32448738316445ff9872f2e45e76cbab.pdf?index=true
    • http://getakufo.epizy.com/vurepegez.pdf
    • http://jenepopavuse.epizy.com/blank_invoice_template_excel_free.pdf
    • http://jidabalelibixu.rf.gd/blessed_be_your_name_satb_sheet_music.pdf
    • http://nadalapaxizo.epizy.com/nakatid.pdf
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_9876a11f8d124397bb3b258bb974f640.pdf?index=true
    • https://a35aa970-3e4e-4c20-be1f-53d10001bce9.filesusr.com/ugd/af4e73_1c5a45841e2c4997822722919bfc9b47.pdf?index=true
    • https://uploads.strikinglycdn.com/files/af0574de-6304-4b93-93a2-851891668ed7/argonauts_of_the_western_pacific.pdf
    • http://zasuzutan.rf.gd/30494909977.pdf
    • http://rimamosapike.epizy.com/heart_blood_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/a1b321d1-975a-4e4e-904f-c67bbf1705ba/zeluxisinijup.pdf
    • https://aa84fbb7-d3ea-4675-94d1-3a2d808898f4.filesusr.com/ugd/661a84_2fafb3ff14914091b54fe3a3ba761065.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00014e38.bin
7e20e47f0c56d5ef2a1a3e91a9c28b415d60a303a236f4c3e501ae0b0515dde4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14E38 29276 bytes
font_00_sfnt_off000100bf.bin
e1b1c1295324f83db324de50065a87b689214c69c7ac84e7ac2c1241a0c7aa71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100BF 5756 bytes
font_01_sfnt_off00011468.bin
584709f92df0914e2ec45c4fdb3b415a5c1149f2a18d09684f4359acf96405a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11468 9704 bytes
font_02_sfnt_off000135fd.bin
8acc274b8111d251e59e2baffa0fc691c7c52a950c7a0dccdaf1b0b9401038a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135FD 16940 bytes

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