Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a08544427d9a330…

MALICIOUS

PDF

60.5 KB Created: 2021-02-06 00:38:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d09b250647cbe879860f47f8ebfab778 SHA-1: 709df377c77e113e823d669fbf732e0ede86dd63 SHA-256: 3a08544427d9a33077ae4cb5c64c13eed5e35712114e97730d7a66aa602620c8
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/wb?keyword=destination%20b2%20macmillan%20free PDF link annotation
    • http://rewuvov.iblogger.org/letter_t_activity_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/gabamulijawe/MfjbifO/ridorelusovajigupivanuti.pdfIn PDF document text
    • http://reduslim-officialsite.site/ark_tek_generatorhaqe2.pdfIn PDF document text
    • http://xofajenakimexo.iblogger.org/1783946399.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/kosamupim/81776503018.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/37672113784.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/47758892166.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/album_alleen_lil_kleine.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/history_of_japanese_architecture.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/synonyms_worksheet_for_class_1.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/avison_young_calgary_reports.pdfIn PDF document text
    • http://wekidezeze.epizy.com/69614099935.pdfIn PDF document text
    • http://sotatelovutegep.epizy.com/affairscloud_weekly_february_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/29473292059.pdfIn PDF document text
    • http://maxeses.rf.gd/flight_simulator_3d_apk_mod.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_off0000b2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A9 5296 bytes
SHA-256: 9b6c9b0606e607a673de1a9c1d5c02c95ec1cbb7884a3d2d2c19ef0fc1a0bb19
font_01_sfnt_off0000c4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A1 9496 bytes
SHA-256: 4fb734fc197a1facf2a38906fa166046394d2a8ac8026d673e81f746af24a31c