Malicious PDF — malware analysis report

Static analysis result for SHA-256 947eec5bf1b88b7b…

MALICIOUS

PDF

66.7 KB Created: 2020-11-18 09:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 64c728c9662fb00807358071e3d6d321 SHA-1: d37016ef9dab77997f5e48cdad317e8ade7a7afc SHA-256: 947eec5bf1b88b7b541c489d5a793e31c73b78161c1275104a46c916594a1332
214 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 embeds a large number of external links characteristic of an SEO link farm and 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 0.9997

Heuristics 5

  • 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.
  • 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/123?utm_term=leap+poem+meaning In PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/4089950.pdfIn PDF document text
    • https://tibiwoxot.weebly.com/uploads/1/3/4/8/134881218/b175a.pdfIn PDF document text
    • https://jugefisofewutep.weebly.com/uploads/1/3/4/3/134368120/8179753.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/kizuporowefib/bikokowikogajawowom.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/dotibanimuti.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/53366020543.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/79788574399.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/84335282527.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/translation_in_hindi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/neumonia_viral_pediatria_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/6584745215.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA89 4776 bytes
SHA-256: a7b90173735d9cccc6bc9446dcb04b092526c11d51a60b26a7f4e51b1fe7169c
font_01_sfnt_off0000dabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABE 10564 bytes
SHA-256: bc320606aa271999c9cb69cb8ecb267daf20e2653a649b7237d80d54ff952712

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