Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd6c367c00dd0fa…

MALICIOUS

PDF

73.2 KB Created: 2021-03-02 15:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4e081f6cd664900e6f9ac8b19f1cbce8 SHA-1: e970b946299eba4c9bf07c8bea604f9a5438f56e SHA-256: 4fd6c367c00dd0fae5d39d30016fbd714fa988aae8943d513285a029d8b1de76
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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://fokemale.ru/award?keyword=line+6+helix+lt+vs+helix+hx PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469831/normal_5fffc2a269b28.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/dikogu_tatawomaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzudulo/ihG5Wgg/19861100245.pdfIn PDF document text
    • http://lifuzerewema.iblogger.org/voxopalulosikuwuxarakuko.pdfIn PDF document text
    • https://ribupawotomimam.weebly.com/uploads/1/3/4/6/134694318/wokan_verizigelin_lisasorenobiru_femeletadalud.pdfIn PDF document text
    • https://xevexotu.weebly.com/uploads/1/3/5/3/135309825/wotob-fopusesox.pdfIn PDF document text
    • https://sumiloruxefeme.weebly.com/uploads/1/3/2/8/132814276/7289076.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/daselex/catapult_king_hack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/grade_3_mcgraw_hill_wonders_3rd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/manopiseroxenekeb.pdfIn PDF document text
    • http://kubivakov.epizy.com/angles_of_depression_and_elevation_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/bose_docking_station_bluetooth_upgrade.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/home_child_care_licensing_manual_ontario.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/817286050.pdfIn PDF document text
    • http://gisatazab.rf.gd/neteg.pdfIn PDF document text
    • http://kaxogesidod.epizy.com/63405695519.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/directv_freeform_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/uc_browser_apk_indir_android_2._3.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_off0000e4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C5 4692 bytes
SHA-256: 71ee3857144d229d0005b9579ab87d18c058167ac7fbf6a1484544cc7edcd2b6
font_01_sfnt_off0000f4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C8 10296 bytes
SHA-256: 89f9ddc29a33cb5d93da482fde20f44afe2f63b704d8fbf72688c229694e4a3c

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