Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0dc5d412997c046…

MALICIOUS

PDF

42.4 KB Created: 2020-11-02 22:14:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 36c78e2a0ae799b28b668894d77ece5d SHA-1: 34efb56dc24483ba4327e4e085ce812dce9363d8 SHA-256: e0dc5d412997c046795d0ad7721921d322eae216a5401cd2485571a2ee4344d3
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a link farm and a redirector URL, indicating an attempt to lead the user to malicious content. The presence of a "download" button lure further supports a malicious intent. The ML classifier strongly flagged this PDF as malicious, and the embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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
  • 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://ggtraff.ru/strik?keyword=playstation+emulator+apk In PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/luletetepaximepavek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c78a1d9-3890-45da-8ef0-154bac2945f0/natorekudijuk.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/90914327098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53ac37d4-6dec-49b9-8e14-14f43d2041f2/vindictus_additional_damage.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/ac_vs_dc_pros_and_cons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/1461/6752/files/chapter_25_apush.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46f4de90-e8b2-4b88-bff0-d25536771488/nojuxidor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2159b078-d852-4190-9cee-7ad057a1f5f0/99991384569.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/ditujufoba.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/pink_lady_apple_nutrition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52c6fa99-0d38-4e0e-9205-d50aa2efbaa6/how_many_valence_electrons_are_in_neon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5135/1197/files/evans_high_school_musical.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/la_fitness_waldorf_md.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_off000064d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D4 5132 bytes
SHA-256: 5c90a84a199a605ee939d4300abd53fde031793cfd0e79ce44e73cba34de5002
font_01_sfnt_off0000763a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x763A 11316 bytes
SHA-256: aab93601601f91ccb21bf08687b79c6efe519da20a8ec6700796cf59aad2d346

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