Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0925fed9495386c…

MALICIOUS

PDF

76.1 KB Created: 2021-01-06 13:53:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: d18ffd728b512786c4cb01537ab04b77 SHA-1: 0883f0ccfe55926add06ba7077b2081511a43f63 SHA-256: f0925fed9495386cec88bbe1c397ba5ccfca8f7e7e5c8baa95779fb26e920892
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ggtraff.ru'. This URL is used in conjunction with a lure for a free PDF download, indicating a phishing attempt. The ML classifier and ClamAV also flagged the file as malicious, supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/aws?utm_term=beginning+algebra+7th+edition+pdf+free In PDF document text
    • https://nawajutexi.weebly.com/uploads/1/3/4/1/134108687/wimudefezeta.pdfIn PDF document text
    • https://lirisosu.weebly.com/uploads/1/3/1/3/131384099/kevotixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482218/normal_5faafab62fda2.pdfIn PDF document text
    • https://cdn.sqhk.co/menasimax/XlXggid/77354870249.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_5fad389945a4a.pdfIn PDF document text
    • https://sawawinuta.weebly.com/uploads/1/3/1/6/131606003/fa40e6c.pdfIn PDF document text
    • https://jizenifujepuv.weebly.com/uploads/1/3/4/4/134489688/5089201.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/bawalidamovidud/group_7_periodic_table.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/97697355071.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/debt_acknowledgement_letter_template.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_off0000eb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2B 5396 bytes
SHA-256: 1512a59667a35cb19d2d1da0a1909bfd4df21b4142739bb88fdf393ec8e8a3d9
font_01_sfnt_off0000fd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7F 11416 bytes
SHA-256: 0af44b345b0773c51bb5c87a1af92ec17199d0d8474a363d0bf80d91437dd634