Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c19f50df6dbd0a…

MALICIOUS

PDF

73.1 KB Created: 2021-03-04 19:26:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b944b7cd3df3b6d6eee3f6f3eda42e7d SHA-1: b25227082491d9ea44964250aaf6444a31f13b00 SHA-256: 30c19f50df6dbd0a958e9df482af903a8448eda3e4306bdb81aa73b5ba9bd922
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 0.9997

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=the+end+of+evangelion+movie+explained PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4498893/normal_5fd0d3beb9e5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464539/normal_602ee4e3166dc.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/RrPdEgf/dragon_quest_viii_3ds.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikebepo/7vhehhT/metal_slug_2_turbo_rom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ee6bc897-aa08-459d-b6e6-b1b1d69fcba1.filesusr.com/ugd/7ba596_ce86d33bfa3f40d98fd307c184906f70.pdf?index=trueIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_9929fa96448f49cfa7d423d7fd3249b5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5224fd5a-3d05-49ad-94e6-9be5a6798c15/seidels_guide_to_physical_examination.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/android_ndk_cmake_debug.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/delinquent_accounts_credit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/sabejijexitelutu.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/xilunuw.pdfIn PDF document text
    • https://a8fdb364-3865-4521-a36b-e12f4de7752f.filesusr.com/ugd/e20637_e98ddf46053d4a1195b72fafef2a09ff.pdf?index=trueIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_7ca76f8259344d4b86080af1327ffd98.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c58a54fa-1337-4495-952e-4e7cb8364eee/nawamafikagawofasuzewefoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d74d22ae-ce26-43f4-8c37-955c6807ab8b/kosadazokosoxan.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/70021157119.pdfIn PDF document text
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_59a8e03a49d64b4ea36895ce167cbc6f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/somisilegex/dosuk.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/calendar_ortodox_stil_vechi_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/latest_guidelines_of_diabetes_mellitus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a60e44d4-9e92-41a7-b286-fc6ca180ac35/weber_smokey_mountain_smoker_reviews.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_off0000e215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE215 5260 bytes
SHA-256: f2816e8ca4d077bea51fcecb16e457bf1ce47b9c8bf1cfd479d6506c64172491
font_01_sfnt_off0000f3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EA 10336 bytes
SHA-256: d12292bdd8df8e5a92c52da602215a3ff630632599ed39698f0d7898cdd7d690

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