Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0af298053d5fbc…

MALICIOUS

PDF

79.4 KB Created: 2021-03-06 11:33:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 06abf60bcff7e1b3ce9fba27b54c7fc4 SHA-1: 92e070a3201dd1e8a6099345131d01bdc8f520a8 SHA-256: ce0af298053d5fbc55c2aabe7a17f3456db23fe150e23de23ea46e0f465cdc0b
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/aws?utm_term=is+a+drink+package+on+royal+caribbean+worth+it PDF link annotation
    • https://cdn.sqhk.co/ketusugedi/aP8Y5hi/survival_island_movie_online_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/bdkhgih/88863190971.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/ijdFJgg/tedojolowodi.pdfIn PDF document text
    • http://opensalle.xyz/75100309863ucexy.pdfIn PDF document text
    • http://saudiautoinsurance.com/mainstays_tv_stand_assembly_instructionsl0v60.pdfIn PDF document text
    • http://fasad-dom.site/kaxipufebxagxd.pdfIn PDF document text
    • http://firstsecu-paypal.com/ever_be_on_my_lip_ukulele_chordsu6e46.pdfIn PDF document text
    • http://ccckkkkk.space/wahls_protocol0rs1l.pdfIn PDF document text
    • http://chuvashovfamily.ru/nurses_pocket_guide_15th_editionjg3d4.pdfIn PDF document text
    • http://revershjtb.site/19205600977am6y5.pdfIn PDF document text
    • http://thrivewebs.com/guvulevinirew3i1sy.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/2a30a3dd-481c-4f14-8f2c-5ecddb318fdd/nlt_holy_bible_giant_print.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b327eaa-486f-4184-8777-bad6ff6a2cde/69532768968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0199342-3678-460f-ad3c-81e59029c5f2/dan_brown_angels_and_demons_book_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe6eb055-100a-4959-9ef5-dfc85ae3e258/8620985600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a209f66-3f5e-476d-a144-3e121f886e83/19611132887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d778c74-1ac4-49e9-a562-9d888a88296e/zakokitizenaz.pdfIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_7ef64c3f70e4489cbdeb1caefd0c82a9.pdf?index=trueIn PDF document text
    • https://bcbc83ff-a82b-4234-bf1d-c69e8cae54d5.filesusr.com/ugd/057c82_5fd4853608424507838bba9949e63564.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2cde5b2-cd10-45a9-9c43-e01055a25cc7/what_percent_of_boy_scouts_get_eagle.pdfIn PDF document text
    • https://08c3cc13-1ce0-4add-927e-a3aed263473e.filesusr.com/ugd/ccf397_a8be5802aaff467f8f4028ded3726e5c.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_off0000f7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B7 5668 bytes
SHA-256: e56bf8beae173c53135eb719deeca7c5aa1f5d333822c899b0c35abd7ca73bfc
font_01_sfnt_off00010b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0E 10856 bytes
SHA-256: c81328a25a39709c18966ae3f8304285f1a9f57103fec32936badbf58b6d2f2b

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