Malicious PDF — malware analysis report

Static analysis result for SHA-256 53fe38a6dd1054fb…

MALICIOUS

PDF

90.9 KB Created: 2021-02-23 00:26:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7b3c2e5ef82840029cb19a5987ab4372 SHA-1: 53099cba4ef069f58c9e81da21600a2384919224 SHA-256: 53fe38a6dd1054fbe079a296afc7daec3b1b41b05bc7c21f359a19c3d901baa8
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the presence of a malicious URL is a high-priority indicator for this phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://crophysi.ru/wix?keyword=kitchen+gizmo+sous+vide+ee1 In PDF document text
    • https://kerizivol.weebly.com/uploads/1/3/4/6/134665291/1075711.pdfIn PDF document text
    • https://bajipupetezin.weebly.com/uploads/1/3/5/3/135315063/lorulu.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/iijthit/sidecar_road_racing_world_championship.pdfIn PDF document text
    • http://freshremont.com/powerpoint_timeline_template8bq0h.pdfIn PDF document text
    • http://goodsun.space/diferunesuzidarepzqwjb.pdfIn PDF document text
    • https://gakafapokizi.weebly.com/uploads/1/3/5/3/135319358/tifapepeligeg.pdfIn PDF document text
    • https://cdn.sqhk.co/lazogapuvo/ejbLjiV/vepabipitolikiviw.pdfIn PDF document text
    • http://iranomics.com/candidiase_mucocutanea_cronica37fwh.pdfIn PDF document text
    • http://rankingcoach-apps.com/what_is_the_max_resolution_for_dviif3cq.pdfIn PDF document text
    • https://timifuxi.weebly.com/uploads/1/3/4/6/134676324/9800417.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/tarajix/solved_problems_on_polarization_of_light.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/88975867890.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/25049396688.pdfIn PDF document text
    • http://rozepof.rf.gd/72277189688.pdfIn PDF document text
    • http://fibalikirikoti.epizy.com/imovie_tutorial_iphone_2018.pdfIn PDF document text
    • http://xofunuxemijowex.rf.gd/20337576332.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/espghan_reflux_guidelines.pdfIn PDF document text
    • http://pakemeza.epizy.com/formal_letter_with_greetings.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF158 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off0001020c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020C 2952 bytes
SHA-256: cb9072f881c1fe0ad8900bbcc5a20a23fabb306412f64e001cac76c2a9509f2c
font_02_sfnt_off00010c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9B 5144 bytes
SHA-256: 8dfb332e76d6489863ae5a5b02c3773b4fa1303dae2d6dd014faaa03f5f7b6e8
font_03_sfnt_off00011e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1D 13152 bytes
SHA-256: f7917539f3f5d4a6fa62ab873f837d891508c819a561ae74d3a48fe6a5edcad3
font_04_sfnt_off00014806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14806 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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