Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8ffd570ce109d36…

MALICIOUS

PDF

74.1 KB Created: 2020-11-23 10:02:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 01e8fedd2baf155b97698d52e06e52d0 SHA-1: d921b2efcd7e4e5757ba607a083d291f75972035 SHA-256: a8ffd570ce109d367d96fd1699ebf541d42f3b554e576357ba3fe51982071a8f
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds external URLs that direct users to attacker-controlled resources. 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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://trafftec.ru/123?utm_term=science+of+getting+rich+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386613/normal_5faefa139ecd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_5f920472e00e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375350/normal_5f8b9f5ebf797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f87efbbb20e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422368/normal_5fa1de3e188d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405409/normal_5f9bb5ae5174a.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/gumegulaxi/walifemoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/228fd7f6-5049-4a3e-95f8-c950adc70d49/tezigokubuzebiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43918dc8-c2c2-4665-b236-3993faecea93/movie_hd_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/town_of_hempstead_special_pick_up_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/eia_natural_gas_storage_report_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e3f72cb-dc97-41ef-a13c-dde595dcec2f/30390279917.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_off0000e505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE505 5100 bytes
SHA-256: 0053881ec55682b343e62fca4fbb9fb3a17b998fa384e110abfb4084381ff61f
font_01_sfnt_off0000f662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF662 10828 bytes
SHA-256: a64dc78ead103268e8f296f87cf3de0c969f00a23b394cb9bc5cb3573996183d

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