Malicious PDF — malware analysis report

Static analysis result for SHA-256 25adbf4969671ed8…

MALICIOUS

PDF

69.0 KB Created: 2021-03-06 01:58:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: fe1c8005609b2e9b10e21a1714560f80 SHA-1: 4defb6dc68b65d321371d1b607a43f0be455d4c8 SHA-256: 25adbf4969671ed8e0f7f56b4d1bc76704a162afa6c2d1b4bd42439eb0e97df2
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • 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.
  • 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://dafemum.ru/award?keyword=d%2526d+3.5+druid+handbook+pdf In PDF document text
    • http://meetraisins.club/quotes_from_the_book_365_days_of_wonder6iw8x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375210/normal_600255c8aa0e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392660/normal_6005bbda44f66.pdfIn PDF document text
    • http://presalle.xyz/xobisopinobuzufesuvov85taa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369901/normal_5fc811a9eb790.pdfIn PDF document text
    • http://pay-order.info/rbi_guidelines_for_inter_corporate_depositsri294.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417824/normal_6037c515b9896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481509/normal_603b94ee49e3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407724/normal_6009822ca9031.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/bicNjcQ/pipodowozasole.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409393/normal_5fffe222730c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454182/normal_602ec0696fcdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460463/normal_6034123824aab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413008/normal_6024368a82919.pdfIn PDF document text
    • https://cdn.sqhk.co/milevatomog/Pxwjghh/tavoderolawugis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460708/normal_5fef63c019e8c.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/i6ifQSJ/rolling_stones_albums_covers.pdfIn PDF document text
    • http://demask.space/finevobinetrjj43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378604/normal_5fceb0370e8b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddb30abd-67b2-415a-a790-601ace50ce21/zavumojimomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a6dda1d-2cee-4898-9211-1fac7c6be7f7/51740199762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c9472f0-fd1e-437b-87b9-092797b0e1ad/netgear_gs108pp_power_supply.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02f0932e-be54-420e-a7c2-860aa951d84a/are_participation_trophies_a_good_idea.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_off0000cf5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5B 4156 bytes
SHA-256: 3c306e0ec94285d13e87c04bb9d91e20e74eae243bb960c666b01ded030faf74
font_01_sfnt_off0000dd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD88 14464 bytes
SHA-256: e11d00ada4df9c1558a079e15de93b2b21285c815a40f3260397efe9224d51c5

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