Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4141f43422cccbc…

MALICIOUS

PDF

70.4 KB Created: 2021-01-20 05:49:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 948cf1fdab031e721d038b79e31228db SHA-1: 8ff51b95e01736fde44201c9fbcc7a11743cc8c4 SHA-256: a4141f43422cccbcd72303dc593d804a3a1e7af4aad6a827c950970ac883dd13
136 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
  • 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://maypoin.ru/wb?keyword=zombie%20apocalypse%20map%20minecraft%201.%2012.%202 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f8cca041ec46.pdfIn PDF document text
    • https://cdn.sqhk.co/vutexexukus/APicCpv/draw_lines_in_word_2010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392441/normal_5fac3e0cd508d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408711/normal_5fb6e9cad0aa6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403806/normal_5fc9d50a3acf6.pdfIn PDF document text
    • https://site-1167954.mozfiles.com/files/1167954/xinasevinalikumufut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5fe981a338fa2.pdfIn PDF document text
    • https://site-1177858.mozfiles.com/files/1177858/rafagudedomozexut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420910/normal_5ffd1516d27b7.pdfIn PDF document text
    • https://cdn.sqhk.co/judixixelof/bghgU7E/concepto_de_analisis_foda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5f8a27faeb93c.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/tevomenil/94520186262.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/chura_liya_song_female_version.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/aspen_plus_introduction.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/black_leaders_of_the_twentieth_century.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_off0000d80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80D 5576 bytes
SHA-256: 7fa65d8db8cd546fbfb39f8e953e58016b207e6c1948f479721b6984d96e3b55
font_01_sfnt_off0000eb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB03 9924 bytes
SHA-256: 81d11d813e0e3f2a0723e2c3049f0bd3a9d702a3357a0a68cada596be60ef076