Malicious PDF — malware analysis report

Static analysis result for SHA-256 c301b8cfc766afa8…

MALICIOUS

PDF

78.7 KB Created: 2021-02-17 22:41:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a22d21f49700a3ba14cb942bfdf864a9 SHA-1: 33cc29e67eb085723e64cd6fd82a7b5983fb516e SHA-256: c301b8cfc766afa8250cae48e11fea81b4d21c0f0d9f57f3740050384637c596
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL that appears to be a lure for downloading content, likely a movie based on the URL's query parameters. The presence of PDF_URI and EMBEDDED_URL heuristics indicates the file is designed to redirect users to external resources.

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://leonvi.ru/wix?keyword=nas+lost+tapes+2+2019+download PDF link annotation
    • https://cdn.sqhk.co/tuzevawu/cjbvSJc/10268728941.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/gCXkiho/putileteguwefixikuxeb.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/jc4ifjh/gagedowoxoja.pdfIn PDF document text
    • https://cdn.sqhk.co/zutijujes/sgcgdhj/walogipojubodov.pdfIn PDF document text
    • https://cdn.sqhk.co/kamozipu/14ghvLj/lozusabovozoma.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/yhhshbA/76801221637.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/jixerubowi/avatar_tamil_dubbed_movie_hd_free.pdfIn PDF document text
    • http://gemiwojo.epizy.com/53489645292.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/california_acknowledgement_form_fillable.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/sia_cheap_thrills_music_video.pdfIn PDF document text
    • http://fizenigapajawak.epizy.com/biografia_de_augusto_polo_campos.pdfIn PDF document text
    • http://nibudomatimemi.rf.gd/jazz_guitar_arpeggio_exercises.pdfIn PDF document text
    • http://betorigejoli.rf.gd/new_army_pt_uniform_regulation.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/juwuremifiwubiwotawezezi.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/delete_saved_passwords_chrome_android.pdfIn PDF document text
    • http://roxuriwiladubew.rf.gd/zixekunatawixuromuzudo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF88 5400 bytes
SHA-256: 12c156006025016e76cee4ea71b8dbeb8f412ac0561f30a43a32000a69800788
font_01_sfnt_off0000f20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20F 11480 bytes
SHA-256: db4dee1f1fcb0dea0f0b3b1fc9803d85a44372f48f3d31e317f42c8e29c597b2
font_02_sfnt_off000118e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E7 16060 bytes
SHA-256: 10572f3a10760712fbb8352e098d229fd21f48763f52fb6fd9385479015ceb58

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