Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae3e66773ba5e6a…

MALICIOUS

PDF

69.3 KB Created: 2020-11-22 16:20:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 77b0c14a552b84e96e8ce1f3e400faca SHA-1: 105c72ce078c4637b9e94b96bbc52d99cc550381 SHA-256: eae3e66773ba5e6aa67647ea83208bb9c3197c3d8b2fd5ff5144950458a3070b
156 Risk Score

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 0.9995

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 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://traffset.ru/123?utm_term=toyota+land+cruiser+fj40+repair+manual+pdf PDF link annotation
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/xipulupawuvuz-wetojarob-povom-suriwafivu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416125/normal_5f9cde3e479e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384046/normal_5f98bfc383605.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/tonisefoteka/27152412199.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38c2cec0-3fcb-4d33-a0ba-cb5291885c7d/free_rational_numbers_worksheets_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fe90114-7e63-4738-9f59-9af35838aed2/7652841196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/844d3262-ca7b-4a8d-ad12-084e08ece55a/9468449662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee04891f-9dbb-4c60-94bb-ec555d0117d2/82777416212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de48479-4921-4b9f-bcf2-6123d850a5f4/rolesville_elementary_school_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f144e10-a58c-4914-b698-872e07ebb00c/myers_psychology_second_edition.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_off0000cfae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAE 5656 bytes
SHA-256: 620abe54f38e032066a86ee9a2a184f8506bfb59202937be7266674ce8cfab8d
font_01_sfnt_off0000e2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E9 11208 bytes
SHA-256: 194eb1b9e9f44816ee9e47319d69f2c6b11dec524105ee150624a6ccb2ebc8cc