Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cfc4bb791a3848f…

MALICIOUS

PDF

68.6 KB Created: 2021-02-18 11:26:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 592a5540841144394d68c81eda67a410 SHA-1: e7c72a5c22eddd2eb245a5a980f6d6d52cdbedc9 SHA-256: 0cfc4bb791a3848fc8964952750417e1bd748b2414eda25e5b7f5a80e5c9be3b
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://jacksth.ru/wix?keyword=certificate+of+fitness+s95+practice+test PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453563/normal_5fc6b0fd2d32f.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/jewjxha/pinatagram_promo_code.pdfIn PDF document text
    • https://larigagip.weebly.com/uploads/1/3/4/8/134887586/258c3a.pdfIn PDF document text
    • http://naturwow.space/dazudizatamufeqgbmc.pdfIn PDF document text
    • http://portkamesto.site/loniras13ikx.pdfIn PDF document text
    • https://janepaxe.weebly.com/uploads/1/3/4/0/134097288/woxarom.pdfIn PDF document text
    • http://zatoboyvibor.fun/9.snf_kmeler3k5kc.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/xgf3IIn/south_movie_only_music_ringtone_download.pdfIn PDF document text
    • http://missunik.space/3d_map_of_the_universehutcl.pdfIn PDF document text
    • https://cdn.sqhk.co/mekerijiwuv/wghkVcT/32743062394.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369519/normal_5ffc63f2e3937.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392463/normal_5ff7dcb73da45.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/viva_video_apkmos.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/fufegusujuni.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/teddy_bear_coloring_sheets_free.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/a_cup_of_tea_story_questions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/lasuwevomebabar.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E4 5068 bytes
SHA-256: af9fa3dec0715ea01f59f2ac473d8c8d69f7cb6fc9c277a8c2fead83495b4d15
font_01_sfnt_off0000d325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD325 10508 bytes
SHA-256: 2aeb6a0419d40976f4418ae731ceace8f1ec1f3761f6deb1a98fb1c75a2d7c7a
font_02_sfnt_off0000f6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FE 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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