Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc8dc5ba7ffd7fd…

MALICIOUS

PDF

83.2 KB Created: 2020-11-27 23:32:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9ee21fbfcb84a075fe0302011dca96a2 SHA-1: 94c932634ee75fd9d70f57778e7dba86b5d0ba17 SHA-256: 8dc8dc5ba7ffd7fd53a34831c901e1e7dbc2199b1bd50abad091e121ca522090
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support this assessment. Although no scripts were explicitly extracted, the PDF structure and embedded malicious URL are sufficient indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/strik?utm_term=antecedentes+de+la+geometria+analitica In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385880/normal_5fb707ba23b36.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fosalizuzu/51441100065.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/viwimujidalazufev.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/madiniwadovigarove.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/accident_report_at_work.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/bupepigixizene.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/citra_android_not_showing_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/485d2667-b700-45fb-af41-876642d49d47/potobosesepalezewixakaseg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9faef10-41c7-44c4-bfe6-4c63058cabf0/pogolifunipavajomineriku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ecf3da-29eb-4cdb-a0dd-27214420916b/jopekugefepopofudasav.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84E 5036 bytes
SHA-256: f224c5f4398927041b90f0b89d1cd6f378e554cb589b91947a8ed95916abea42
font_01_sfnt_off00010948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10948 11996 bytes
SHA-256: f5bda2659ef06ee7d61456415ee1280714afff100cd39e87f10e63facb5cea6e
font_02_sfnt_off00013073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13073 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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