Malicious PDF — malware analysis report

Static analysis result for SHA-256 445cc8b82706fad8…

MALICIOUS

PDF

75.6 KB Created: 2021-01-21 10:01:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1a9b044e6bbd3a914f1e099e8103605b SHA-1: 100aa567b83f063c2710a6ce57054d662de3381b SHA-256: 445cc8b82706fad818d3eef937d17a5a55ef47e611a0a735d1dcc64e7b80532a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=casse-%20o-%20player%201970s%20cassette%20pack%20apk PDF link annotation
    • https://gufekibeliwu.weebly.com/uploads/1/3/1/3/131382841/2200295.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407301/normal_5ff3cd1bc3389.pdfIn PDF document text
    • https://site-1177842.mozfiles.com/files/1177842/plan_electrique_maison_100m2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469824/normal_5ffb6c6172109.pdfIn PDF document text
    • https://site-1166605.mozfiles.com/files/1166605/jio_recharge_plan_in_bihar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455659/normal_5fe7a6232706b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403820/normal_6008b6a7306f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481164/normal_5fb7a88f38b81.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/numunenoji/creature_full_movie_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/amanda_knox_netflix_reporter.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/power_systems_engineering_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/seresufanu.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/pearson_igcse_biology_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/75451078975.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/33792843933.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_off0000ea4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4F 5460 bytes
SHA-256: bc82e4353b83d9c2ecde12ea1bc3a1058c8996b46d0a3a7b37f626f5bc3b8438
font_01_sfnt_off0000fd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD09 10636 bytes
SHA-256: c88767a1f051b315bc372ee85e525d8a7d10630cee68852642c8bf7880625d5c