Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc4f2b7e2c0dce60…

MALICIOUS

PDF

72.8 KB Created: 2021-01-27 19:01:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 39c13e552587ddd3b85ede4bd2c86d9a SHA-1: a7ca6876b35d20594a74e762aa350472d007e8ef SHA-256: dc4f2b7e2c0dce60017809739db2fcd378d1276394f3269351a1e8d7434201ca
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/wb?keyword=create%20free%20word%20scramble%20game PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450719/normal_60110b6dd1e07.pdfIn PDF document text
    • https://buxutagugumazas.weebly.com/uploads/1/3/4/0/134095839/3074797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475391/normal_5fdc4b579e081.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/qWieAge/lepasevotebobuvuxeza.pdfIn PDF document text
    • https://vogovolakufa.weebly.com/uploads/1/3/4/8/134874318/wedimovoje_binogafi_gagegirupuwi_kitulisepax.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/gcgfia2/strategy_reality_tv_shows_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/tupizurelir/bhdWgj0/suduwositon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390664/normal_5fdc826c55f52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366982/normal_5fdf8c94b80cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378382/normal_5fe0362484563.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/fopalew/kogebeziw.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/58470275302.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/19319529473.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/phases_of_the_moon_worksheet_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/96961299016.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_off0000e0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E6 5480 bytes
SHA-256: 8f19ae2848fe8de264c82304e08efb31923052ae4e2e1c5c82cc767d91f52801
font_01_sfnt_off0000f384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF384 10216 bytes
SHA-256: ba2f869312dd89d0ffa8357d2f802d82093747985ae3d9a25e03e5916b387539