Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1472e33bed6675b…

MALICIOUS

PDF

58.9 KB Created: 2020-12-22 14:11:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8fab99dfbc40657f3feea36c36ea090d SHA-1: 1b57f8e8f3f9e5fd06b047755a1c976d98b00bb4 SHA-256: d1472e33bed6675b23c4ef024220052a99fb0acdb35c292ae37a671e5e8e3549
244 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, and contains numerous links to external websites, including a redirector. The heuristics indicate it functions as a link farm, likely to direct users to phishing or malware distribution sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/strik?utm_term=ninja+runs+3d In PDF document text
    • https://sumomaduge.weebly.com/uploads/1/3/4/8/134884200/028a4d6431e.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/3757215.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/vefaguxow.pdfIn PDF document text
    • https://ribobuwatefinu.weebly.com/uploads/1/3/4/4/134469587/ribotodeda.pdfIn PDF document text
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/3076105.pdfIn PDF document text
    • https://kotageluvo.weebly.com/uploads/1/3/4/6/134652464/116ca2d.pdfIn PDF document text
    • https://xosofanukofupa.weebly.com/uploads/1/3/4/8/134879033/kavemabi_telasig.pdfIn PDF document text
    • https://limofagis.weebly.com/uploads/1/3/4/6/134640762/5892853.pdfIn PDF document text
    • https://mitixomog.weebly.com/uploads/1/3/4/8/134859124/2368022.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/bodepova/40428728553.pdfIn PDF document text
    • https://s3.amazonaws.com/rimadefule/73737142359.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe23485147b14804fc083f/1606296392791/las_medias_de_los_flamencos_english.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf0175d267866a519fe04e/t/5fd03a0a75f5e504856ad41e/1607481866807/85755768473.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/49089025683.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_off0000ac8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC8A 4996 bytes
SHA-256: aec5ea4d28ac75bbdaa55343dc4b3c29eb1660713aa468626b398e68ecd87c8a
font_01_sfnt_off0000bd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD99 9752 bytes
SHA-256: 466d4f0f83efe29ed8fa55d98a3f90bd91c6c106e71717e23b23da0042ee522b

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