Malicious PDF — malware analysis report

Static analysis result for SHA-256 466982748a032e0b…

MALICIOUS

PDF

78.5 KB Created: 2021-03-06 13:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ddebac8ba6098aea5cbcfa58ea589423 SHA-1: 3e709ef410ec99b1f57698c11e4fbbd17c56c063 SHA-256: 466982748a032e0b0a02952cb3046afbaa9369652e93ed49e0c61c7bb1cce5dc
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/award?keyword=how+to+use+my+egg+cooker PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451217/normal_5fc99ca1edb98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502188/normal_603373fa20232.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c480cc3d-c044-45b7-a7fa-747782367dcd.filesusr.com/ugd/a26f59_652ea0e21e11406b81bbbf3c152bc0e5.pdf?index=trueIn PDF document text
    • https://dca540c6-954d-4243-9f09-0921753db957.filesusr.com/ugd/974a4e_2f0a606958fb47a78b95b6215cd2a087.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bejeseja/lipufasedudafulokabuzut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e53f6f8-5fd4-4dfe-a7af-3e729c2a7a3d/mesa_boogie_dual_rectifier_solo_head_footswitch.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/aortic_dissection_type_b_guidelines.pdfIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_ba2ed2b2c99840e78dfcb57435b110b3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc3f4da0-f300-42b5-a6aa-6238f3ee7f37/zepanavofani.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/solitary_reaper_questions_and_answers_ncert.pdfIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_d79a2c6322b940e9b12547e0f261ecbe.pdf?index=trueIn PDF document text
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_755880393c044683802eaac4e7dc3fd0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/sample_excel_spreadsheet_for_inventory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b397475d-d540-4416-bf3a-e315177c03ac/28368814020.pdfIn PDF document text
    • https://49b821e7-ee7e-41b4-809b-d0417b8c1ddf.filesusr.com/ugd/927743_8bd4ede798084d0d849475b1fd2dd61d.pdf?index=trueIn 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_off0000f7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B6 5096 bytes
SHA-256: 04612312931ad125bb6fd20b9b59ac81a50cdc827c34efa48281c8533b05219e
font_01_sfnt_off0001091a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091A 10680 bytes
SHA-256: 0b3f59c6c8a7bed9f878716eeb1f3bddf15b211627fe793b8f038ff193eb7771

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