Malicious PDF — malware analysis report

Static analysis result for SHA-256 6356ef35381c78d9…

MALICIOUS

PDF

67.7 KB Created: 2021-02-08 08:55:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f015750e3db9716de3c5555c07d0f703 SHA-1: 2bb3d91e19395432084302117ee436e6c4136ed1 SHA-256: 6356ef35381c78d9af33af31e43577669436626aa56d147c5e717537ebaa75dd
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, appears to be a lure related to legal documents, aiming to trick users into clicking the malicious link.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wb?keyword=prevention%20of%20atrocities%20act%202016%20pdf In PDF document text
    • https://cdn.sqhk.co/kadunila/jhggcgf/gx_motors_mod_apk_android_1.pdfIn PDF document text
    • http://zusazibob.iblogger.org/audio_recording_interface_for_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376105/normal_5fe4d1691830c.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/kifagurelegex36ee.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/UvVifpR/77933808403.pdfIn PDF document text
    • https://cdn.sqhk.co/liregevo/cDhbjcX/plants_vs_zombie_online_free_games_no_downloads.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/jokotaziweluge/imf_report_on_pakistan_loan.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/84302579759.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/ruzokeboxuguv.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/experience_ludovico_einaudi_violin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/dialogismo_polifonia_intertextualidade.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/sabc_and_etv_tv_guide_for_today.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/pajepabazuga.pdfIn PDF document text
    • http://nimunofat.epizy.com/mac_terminal_commands_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/68651860146.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF2 5660 bytes
SHA-256: 3a10799d6f93266e25f72490d939d379ab2b8dae6f326aaad17152727b75b052
font_01_sfnt_off0000e048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE048 9880 bytes
SHA-256: 3797f1ff3aed8f59d7c146a487c6059fde881707bd2d9e7e1611e6a32a097592

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