Malicious PDF — malware analysis report

Static analysis result for SHA-256 27accd7c6e5ba9c7…

MALICIOUS

PDF

76.9 KB Created: 2021-03-22 15:04:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3af434d279bf1abe02b6bed8f93e2612 SHA-1: 7e85d827b4b71f05654125b882828a9ff0ad9662 SHA-256: 27accd7c6e5ba9c7affcb11af2a1158b954b382453694e4435adfa632a467cf4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 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://leonvi.ru/strik?utm_term=most+radical+phase+of+the+french+revolution PDF link annotation
    • https://cdn.sqhk.co/fefuxumito/GqPgjgi/tattoo_design_maker_app.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/bhdOgja/lebaran_haji_2020_bulan_berapa.pdfIn PDF document text
    • http://boderuj.iblogger.org/jopilawi.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/ihjbm7Y/28512136738.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_d0efb7c82e3a4d879abbf948701f95b1.pdf?index=trueIn PDF document text
    • http://rupilozomu.epizy.com/50848437935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2ef5d1c-ba1f-4ddd-9d1f-09ff9e6520f1/can_i_use_autocad_in_macbook_air.pdfIn PDF document text
    • https://b133b025-67d1-4190-9e53-fbb99503dec2.filesusr.com/ugd/caf13f_700321e80afd40d8bc47e7d065e4052c.pdf?index=trueIn PDF document text
    • https://b8436764-02b3-4471-8711-1e8fed235cf0.filesusr.com/ugd/3b3fbb_cc757d89183e4583827c7ee1e79ff4bc.pdf?index=trueIn PDF document text
    • http://dusijilesa.rf.gd/basketball_rules_and_violations.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/75064445916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2afce23-2380-4eeb-8d8c-cd05f7c11fe9/wajikezeke.pdfIn PDF document text
    • http://notixowazi.rf.gd/how_to_use_the_bissell_proheat_2x_revolution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2e1f1be-bdd2-425e-a4b1-64b4657e32ce/59430213288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78cd280a-636c-4e02-a7aa-532ae6b239eb/call_of_duty_cold_war_free_upgrade_to_ps5.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/files_to_sd_card_app_apk.pdfIn PDF document text
    • http://riluromeni.epizy.com/bank_exam_practice_book.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/professional_correspondence_letter_template.pdfIn PDF document text
    • https://64f1e6a9-4530-4009-9f9b-67b91dd69f79.filesusr.com/ugd/76b6de_8e5b043e759d4358b27fe8849fdd8f5f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b776191-f835-44f2-8116-a6dea6cf52f9/free_2001_vw_beetle_owners_manual.pdfIn PDF document text
    • http://zofikexegugimum.rf.gd/kajakodagopuxaxibigoz.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/barcelona_vs_villarreal_4-_4.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_off0000edb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB0 5308 bytes
SHA-256: b94180eef0b7099c30c2a0fd01714e223499b1868ff3dec6a9e2c8b4ff60fef3
font_01_sfnt_off0000ffce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCE 10688 bytes
SHA-256: 63d291cd42199ea0116353bcd4d4b4dfd5ecdf9b702b7a30c97d9c15e76a4fd4

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