Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e20fde0937a4c1b…

MALICIOUS

PDF

71.0 KB Created: 2021-02-17 03:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6942fa565927eea60426bd62b174fc5c SHA-1: f377a195d5e9700ad9ae72d7064835e6dad67abb SHA-256: 3e20fde0937a4c1b79dc8cd42946f77dd6d073a242df07be0cc0b482d9348c17
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with a primary suspicious URL pointing to 'seumenha.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links, likely for phishing or distributing further malicious content. No scripts were extracted, but the presence of external links and the overall detection profile strongly suggest a phishing or malware delivery attempt.

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 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.
  • 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://seumenha.ru/strik?utm_term=the+pedestrian+ray+bradbury+symbolism PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403565/normal_6003b67e5581d.pdfIn PDF document text
    • http://casser.xyz/latox9yoku.pdfIn PDF document text
    • http://docita.fun/magix_music_maker_17_premium_serial_numberqhr3s.pdfIn PDF document text
    • https://vukuxonujifated.weebly.com/uploads/1/3/1/1/131164545/tapikakij.pdfIn PDF document text
    • http://accface.in/vuziwevizenu0108t.pdfIn PDF document text
    • http://daravto18.ru/workplace_inspection_checklist_template_nsw8x6st.pdfIn PDF document text
    • http://infonewsuk.site/decision-making_under_certainty_risk_and_uncertaintyn4myj.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/bezorito/90196018721.pdfIn PDF document text
    • http://vepibali.rf.gd/printable_banner_letters_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/21352693883.pdfIn PDF document text
    • http://gefuxexo.epizy.com/tv_guide_listings_tonight_nyc.pdfIn PDF document text
    • http://dotenax.rf.gd/xobabi.pdfIn PDF document text
    • http://favekagopu.epizy.com/four_fold_brochure_template_publisher.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/jumufamofesirotekikuvux.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_off0000d95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95D 5392 bytes
SHA-256: 53bd40c0a19f34052f5ea1a28078a1fe318f2e961f29c13985f43e872bdc558b
font_01_sfnt_off0000eb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB83 10356 bytes
SHA-256: 7bd02649008418e9f1dee6537aa508b3b917debd4740f8c0ec25f60a89f1f81b

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