Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28208b7ab1c3fab…

MALICIOUS

PDF

80.1 KB Created: 2021-04-02 16:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7119d0938633ffeb111edf962dd8b345 SHA-1: b5a555562823526130864f0def18474cad95f38f SHA-256: d28208b7ab1c3fab6be8952f2b95086f0fe4401b22d3d977282fdd14eb8477dc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF that contains numerous external links, with one prominent link leading to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://leonvi.ru/123?utm_term=cricket+score+sheet+format+excel PDF link annotation
    • https://supesitibozuxo.weebly.com/uploads/1/3/1/4/131454850/fb83d752.pdfIn PDF document text
    • https://fimufezav.weebly.com/uploads/1/3/2/3/132303131/48a12e0ea1a.pdfIn PDF document text
    • https://rupanusevufow.weebly.com/uploads/1/3/1/3/131380126/69af69.pdfIn PDF document text
    • http://bupetud.xyz/necromunda_underhive_wars_story_walkthrough8e84o.pdfIn PDF document text
    • http://robertferrell.net/fufitixqz3v9.pdfIn PDF document text
    • http://fitokaps.xyz/are_solar_watches_any_goodrkm0x.pdfIn PDF document text
    • http://digtalcaliper09.xyz/is_ap_art_hardw1dcc.pdfIn PDF document text
    • http://mpvideo.org/informal_methods_used_to_amend_the_constitutionhi653.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/fejakixoweka/2003_dodge_durango_for_sale_by_owner.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/chimarruts_versos_simples.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/xaxejigijeretigonatin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06324f76-4c11-41d1-b4ef-e075a7264c82/wakunuvizorefuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/126cc6ca-8d23-4357-a568-8a1e68258471/zerejatewasisitudalusada.pdfIn PDF document text
    • https://2e9d2e4a-15d5-4529-8b29-235aceea4e08.filesusr.com/ugd/cac96f_42075ffe88884154a5e074435042bcdf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/iec_62304_test_report_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6a0174d-0d61-4be0-a821-91c646343c91/pride_and_prejudice_book_summary_chapter_1.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/sakthi_general_english_guide_book.pdfIn PDF document text
    • https://804b95bc-9ca4-448d-a094-5a8e1ff69a26.filesusr.com/ugd/99d1da_3a8f6e85f8a84ca8a150c924ba985d3f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zetituri/monsta_island_czars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a3f664-9daf-4201-8137-94523d4f09b0/51663606076.pdfIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_fb8ecbf2f3d0475294d7ea193b33b6d0.pdf?index=trueIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_12751063a9954d1ba23f4ff2401c74b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/how_were_womens_roles_changing_in_the_1920s.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/37877914516.pdfIn PDF document text
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_d1d31761fdc343dcbae7ffdd9a094d60.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_off0000faed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAED 5156 bytes
SHA-256: 221260074df8d045976f4660cb405f339f76950344a8c09e557021baa4648f34
font_01_sfnt_off00010c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4E 11304 bytes
SHA-256: a31a1d5ffc032089dcbf1ef8d2557529f1cb2fcbd5bf7f260ac9128838ed618a

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