Malicious PDF — malware analysis report

Static analysis result for SHA-256 7513832d6800c125…

MALICIOUS

PDF

79.2 KB Created: 2021-03-14 09:57:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0972ec74653f8ea979c7d379be11c32f SHA-1: 5960c116597050c05a3795f81eb4fbbc2fef3009 SHA-256: 7513832d6800c12554e0ebb7e0a63fd04f384b9b69b8d41bab78aa287366ebec
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/strik?utm_term=my+tv+will+not+turn+on+from+standby PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494875/normal_601b674c5166c.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/wojananitinuj.pdfIn PDF document text
    • http://jofarofuwudeveb.66ghz.com/1610035331.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411273/normal_5ff9f00081fe3.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/xukonakefules/broad_beans_planting_guide_nz.pdfIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_8070c21901014935845723211319a11e.pdf?index=trueIn PDF document text
    • https://793776f3-68b4-44d3-947a-596ce2c6f652.filesusr.com/ugd/4e977a_e7eedf0303b74733b3a58ef8bad5e17d.pdf?index=trueIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_1e6eff6b514a417c8aeedec93c760fa3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/69717759873.pdfIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_79d330a5b17340949a9c7c8ba2e2a0b8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lupebesu/silazowonarokaxenusaxuboj.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/tulamo.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/iron_jawed_angels_movie_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/steam_sizes_for_games.pdfIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_c2c0b8e3b5f34d49ae612a817c56eeca.pdf?index=trueIn PDF document text
    • https://0e75ab8e-f6a1-4360-bef2-1d94e06fde4e.filesusr.com/ugd/c0518c_bd474b3c4bad4d0280bf17f46f1616a1.pdf?index=trueIn PDF document text
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_dca96cc7906e404ca1a40e8cf5f57e18.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/befunky_photo_editing_app.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/video_converter_online_to_mp4.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_off0000f6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AB 5452 bytes
SHA-256: 0f8bffdf80d06c9e0c8dc0cdb2cec849262f02da3cab3fbc1ad534908ff855f8
font_01_sfnt_off00010942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10942 11472 bytes
SHA-256: fb542fa9a56ce0d0b6bb26942bd156197479229d7e0836da85be84c89027e649

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