Malicious PDF — malware analysis report

Static analysis result for SHA-256 51c2e2bc09810c92…

MALICIOUS

PDF

69.2 KB Created: 2021-02-16 01:04:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2206c54970022156ea1872e0615e6b28 SHA-1: c4d6dbfa0aafe748c1c144f6e228eab87c5c41c9 SHA-256: 51c2e2bc09810c92287a643a8087a9fe287482aa8bd3c39548060e8010eda05d
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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://yafferge.ru/wix?keyword=dishonored+2+chaos+guide In PDF document text
    • http://sevotapapi.22web.org/antra_singh_priyanka_photo.pdfIn PDF document text
    • http://limons.space/how_to_study_public_lifea94u6.pdfIn PDF document text
    • https://vesukinixemijuw.weebly.com/uploads/1/3/2/6/132696016/72c16.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/fapaga/derivative_of_exponential_functions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/7526894435.pdfIn PDF document text
    • http://nenidexixod.epizy.com/vifopidiju.pdfIn PDF document text
    • http://zugawixiwo.rf.gd/tenta_browser_apk_mod.pdfIn PDF document text
    • http://tamakibegotilo.epizy.com/63324855020.pdfIn PDF document text
    • http://funizenobuwuka.epizy.com/jenadade.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/baidu_hotspot_setup_free.pdfIn PDF document text
    • http://mimiwuzoxul.epizy.com/nasijamemigujozip.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_off0000d3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D5 5300 bytes
SHA-256: c23024f4b095ff29efcac6a9efa77023ddf5f449b90d62e807fff9602dba58ed
font_01_sfnt_off0000e5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D6 10164 bytes
SHA-256: 959854d54bdc9047a5f4c0cf8adaf20fc1b9ddf7d24382aff220174199958960