Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c3fc868db3c8b60…

MALICIOUS

PDF

83.2 KB Created: 2021-04-04 22:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4f200a4f0486bf107ca245d137ef828b SHA-1: 53ac5e5de9ebbb41c031d17a11a8511e292542db SHA-256: 9c3fc868db3c8b600fae1106a4dd4eec3900c83fcbc8853ac1cc89c8503209ba
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=wd+4tb+my+passport+ultra+metal+edition+%2528blue%252Fblack%2529 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4463812/normal_5fe1111e69ab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384633/normal_604f00676a164.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/zHgfdhd/piano_apps_free_download_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/gjKBwhB/first_horizon_bank_business_hours.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384295/normal_5fe97043edbea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5fe7b681e965a.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/hcyogjR/31603757361.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/YicW1gg/crash_car_smashy_road_goes_on_water.pdfIn PDF document text
    • https://cdn.sqhk.co/vozogekom/e9Vqtjh/98845685060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403282/normal_604a7d3490560.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374686/normal_6038605eaa2d4.pdfIn PDF document text
    • https://cdn.sqhk.co/sajixobuko/fgemD3A/manchester_united_last_match_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478716/normal_60434e3821ace.pdfIn PDF document text
    • https://cdn.sqhk.co/xujifomevesa/fgcfiab/nevumikokometoj.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/jIEcMih/electronic_protected_health_information_ehr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/patilawasu/alaris_gp_pump_manual.pdfIn PDF document text
    • https://4b3b4da4-1145-40fd-8a04-0ac29766dab0.filesusr.com/ugd/6c6203_95cfb7c236c14cbe9047776b3490d992.pdf?index=trueIn PDF document text
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_eda2dc9a07f74ce49e783b3d732d3344.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/batiku/free_template_photo_slideshow_after_effects.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2C 5816 bytes
SHA-256: fc7661a1055c2c9f1b746ed93a91b0293dc486db64048a366c73aafa78537f06
font_01_sfnt_off0000ff00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF00 8348 bytes
SHA-256: 0c8cd9b0aa4b9f18d84560101d9608c998db7cd4799a293d5aebea6dfbf4519a
font_02_sfnt_off0001165b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165B 11960 bytes
SHA-256: 9ed6cf9f8f01cb59e907c0769aea9534486b65a445c4f933a9fa374ac8c7805b

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