Malicious PDF — malware analysis report

Static analysis result for SHA-256 82cf04cde99ba203…

MALICIOUS

PDF

71.9 KB Created: 2021-03-14 10:44:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d1227965848830b18049e4797739e835 SHA-1: 17595a5c528660b8921acf48a7e07c776fb8a954 SHA-256: 82cf04cde99ba20307bd99b49081d4940b20f6e4226c05db6ba66cda081767e5
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://resalured.ru/123?utm_term=christian+songs+tamil+free++freddy+joseph PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453908/normal_5fcdb83200ed2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389801/normal_5fe8f4f9be520.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/g2av2he/narememupe.pdfIn PDF document text
    • http://salonapp.xyz/stihl_ms310_farm_boss_pricepamci.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469626/normal_5fdffcd0d3b27.pdfIn PDF document text
    • http://gnfcns.info/farming_simulator_15_xbox_360_cheats_codesnlafw.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetovukufo/jfg4jhk/hello_kitty_nail_salon.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/dhhMgcQ/bokitimumelinenuxet.pdfIn PDF document text
    • https://cdn.sqhk.co/bamebuxi/gejgqjg/best_lightroom_presets_free_download_zip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426413/normal_6035ce08927f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497372/normal_5fd92e30cb6e2.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/xamibudasagas/37165605556.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/sprint_scrum_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/50738761149.pdfIn PDF document text
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_a1f97bef523d47bc81b037ac224a91ea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vapite/bandook_chalegi_teri_song_pagalworld._com.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/pioneer_deh-150mp_manual_espaol.pdfIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_0750bf839e60468b8acb1bc6855c3a5c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/bottomsheetbehavior_disable_dragging.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_off0000d939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD939 5536 bytes
SHA-256: 66f4a0cde91a256947e22a5c32b2f1c001ed935c67e3183d3260e5f2a3769e4c
font_01_sfnt_off0000ebea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 11408 bytes
SHA-256: ea9252fe1a9cfeeb8bc97cac4fa191e0b071e6c7fd5407e76ffe47df2b7b7322

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