Malicious PDF — malware analysis report

Static analysis result for SHA-256 893e0878d5bc773b…

MALICIOUS

PDF

98.0 KB Created: 2020-11-25 11:06:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0ff325bef2e94fb5b0d86502418049a5 SHA-1: a18d4326c192b12302a5a93271584f1a7148653a SHA-256: 893e0878d5bc773b623136dd3a9841dedf1534f51bd081de14f642a3e8929d96
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to redirect users to potentially harmful sites. The ClamAV detection and ML classifier strongly indicate maliciousness, with the heuristic pointing to phishing and trojan activity. No scripts were extracted, but the presence of numerous external URLs is a primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?utm_term=carne+de+gallina+de+palo+en+puerto+rico PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392237/normal_5f9ad0f536f82.pdfIn PDF document text
    • https://bufazori.weebly.com/uploads/1/3/4/3/134377245/pomejoliwogasom_pugoxaw_papagari_napinefanekew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391340/normal_5f97a46bbb848.pdfIn PDF document text
    • https://tugigoboz.weebly.com/uploads/1/3/4/4/134499705/govowamo-nelegexov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f8eb85283c78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467573/normal_5fa2bdf82e77d.pdfIn PDF document text
    • https://fitarobut.weebly.com/uploads/1/3/4/6/134690469/b27f681d47d721.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5f88084212525.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457573/normal_5fae295ec91ec.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/4892010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374686/normal_5fb285ca2ba55.pdfIn PDF document text
    • https://weludabaner.weebly.com/uploads/1/3/4/8/134854782/zokuxizixe.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/laradusa/saint_petersburg_metro_map.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/basaltic_rocks_form.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_off00013f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F1D 4968 bytes
SHA-256: 3ddf50c9c4ce5f84cb3bfcae028b2c9e59b7b4762230ae04361609828b356212
font_01_sfnt_off00015012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15012 12692 bytes
SHA-256: 477a0e29dd08f7d47fcdbe40f89013dabd1a1b4f7f7c7308f72b4a657b796ed1

Open this report in the interactive analyzer, or submit your own file for analysis.