Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5a24cc9c2447ac…

MALICIOUS

PDF

68.7 KB Created: 2020-11-21 11:40:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6b4699e24b25bcd53fb27869e47ef5b9 SHA-1: 115c31295538215292729b97815944961b95327c SHA-256: eb5a24cc9c2447ac710e8f9fb5c52ea66594ee172d30ad7d8d8a080dc0f29e99
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 0.9997

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://traffset.ru/123?utm_term=altar+of+zeus+from+pergamon PDF link annotation
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/2080317.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/tefomopituvafad_taporexetezi_tenakogaka.pdfIn PDF document text
    • https://femimujuzo.weebly.com/uploads/1/3/4/6/134640298/339ea4bc.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/metakibeme/24729231375.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/35124218210.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/hogan_s_heroes_theme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69430d69-96bf-4339-b885-380bedc970f5/94628639597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06375a81-1905-4cd2-a587-29fc2bc00b14/sexewepuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b138a11e-0dd6-44d1-a36d-3e4b287f9578/pensamiento_filosofico_de_hegel.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/danadogug.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/28782636368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eebb949-fc68-4247-93fa-6eae1faac47d/i_wish_grandpas_never_died_mp3.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_off0000d2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E0 5260 bytes
SHA-256: 59df06b65fb0dc013e2ab28500c75ddd8372da0a4dba9a5090340758df065463
font_01_sfnt_off0000e4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BE 9876 bytes
SHA-256: aa0e3f2e99dfca90dbcd9792c4c4b0aa24b375216891b707609e9a2205ee339c