Malicious PDF — malware analysis report

Static analysis result for SHA-256 615f774072f66576…

MALICIOUS

PDF

61.0 KB Created: 2021-01-02 21:57:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: cb58fe05d787e08656c5d4f6cd0ad3c8 SHA-1: 9932a205bcafc5f6fea32ac70b89b87bec3609dc SHA-256: 615f774072f66576f16a62a23acf0d55dba709d81af92a4805396196ee8bf0d1
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://traffmen.ru/123?utm_term=yoshi+copper+grill+mat+commercial In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403681/normal_5f9cf7a3762d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375341/normal_5f8f873b3d789.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/alijCn2/gimuxipero.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvajuvewuj/TEeijgc/febubipuxut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/47980d3f-bdcd-490f-ab35-221cb98cf0f2/webadujuwex.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/21092645582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f49a3dd-adfa-4796-ad1f-df7c49ded99f/gagimuxunewav.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/cambodia_visa_application_form_for_bangladeshi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e0ec2b-1531-41b7-b24e-bb18defb2a00/vidagojuritiwiwodimezax.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_off0000b123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB123 5308 bytes
SHA-256: fd17ae967909f7ce1769ea0c3a1e175f61df997cd53073fade06d0ba90e2427a
font_01_sfnt_off0000c30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC30B 10264 bytes
SHA-256: 3d4aac159205339ba7f7cdce50a6e7f9409138a372fe00f0dff59a2e3041b2d0