Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd21ac14652126c…

MALICIOUS

PDF

79.6 KB Created: 2021-03-29 21:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4943c83823b78c8d204a408232d88387 SHA-1: 5060ce757a5098723b9a8ebf867efd094cfc399b SHA-256: 2dd21ac14652126cb50f402e1dce4349c5d0db35f7dcc980e2c6a73d4414a115
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 0.9998

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 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://druttle.ru/strik?utm_term=how+to+get+mulesoft+certification PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383801/normal_6005a23a3df29.pdfIn PDF document text
    • http://sebizusimajali.22web.org/yard_machine_riding_mower_oil_change.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455176/normal_60570b5aadf56.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/chiller_trane_koolman_500_manual_espaolt4w1n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501027/normal_605b2453b2ad9.pdfIn PDF document text
    • http://xteenware.online/1985_suzuki_quadrunner_250_stator0yzoq.pdfIn PDF document text
    • http://vexetifiridik.mypressonline.com/refotot.pdfIn PDF document text
    • http://xilibinebosapeg.mywebcommunity.org/old_man_and_the_sea_notes.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/kabizeri.pdfIn PDF document text
    • http://fruktovik.com/descargar_zombie_hunter_apocalypse_sniper_shooter_gratistd5h6.pdfIn PDF document text
    • http://wurilozi.scienceontheweb.net/download_my_aadhar_card.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369665/normal_5ff0299d297c9.pdfIn PDF document text
    • http://galoomer.online/32852018335sfjp.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/90706719212.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xerefigirusew.epizy.com/advantages_and_disadvantages_of_mobile_phones.pdfIn PDF document text
    • http://saxogif.epizy.com/early_childhood_education_today.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/61315743478.pdfIn PDF document text
    • http://jinonepi.epizy.com/simple_business_plan_download.pdfIn PDF document text
    • http://pakifisaxere.epizy.com/what_do_you_say_to_someone_who_is_stressed_about_school.pdfIn PDF document text
    • http://rogomore.myartsonline.com/woxom.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_off0000f909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF909 5252 bytes
SHA-256: 919deaaa3f711c2bebcbe1f447d2e032ec5c19289fcb854d0726f8f77f38e4a8
font_01_sfnt_off00010aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEA 11352 bytes
SHA-256: 3c576697c955ae04cf33dd86a560dab36d187868b7d2b191b7df37d3068b3ab5

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