Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f9189bc92d23698…

MALICIOUS

PDF

71.0 KB Created: 2021-02-19 11:32:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a5849c923de56ed92afec7d204d3410e SHA-1: 58f7d31a8390f0db27bb16f4d962a1d71f363cff SHA-256: 3f9189bc92d236984523f608711851b8c87c93f0cf553f8256db1c916384efdc
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=irwin+laser+guide+battery+replacement PDF link annotation
    • https://katesagi.weebly.com/uploads/1/3/4/8/134864962/lubuzozipazasa-kowazas-wedarez-xusuwiw.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/GieljiZ/togidosibogiwupijefimaru.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/jolim.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/WnicRih/habit_7_sharpen_the_saw_activities_for_adults.pdfIn PDF document text
    • https://cdn.sqhk.co/tisumusef/dD8gdRD/real_followers_for_instagram_apk_new_version.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428341/normal_5ff81c5171287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408701/normal_5fd3315e3a029.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/DiaKPEH/12255948534.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5fd2678e0ffc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447101/normal_5fd2ee9a96841.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/tozaduliwubega/tennis_elbow_manager_2_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/xijeb.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/canoscan_9000f_mark_ii_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/implant_direct_guided_handle_kit_video.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/23701778578.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/32242930438.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/sewexero.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/whatsapp_new_version_update.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_off0000d76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76A 5664 bytes
SHA-256: b5ee6107bd12499e15787c7ad8a32ce00607f44980602f1d3872e11739f21ee0
font_01_sfnt_off0000eaad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAD 10548 bytes
SHA-256: 7fae4ad483d33189acb7b3ef21744d6111e5ba4e7d61e0687f5b0b7629a770ea

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