Malicious PDF — malware analysis report

Static analysis result for SHA-256 cebdeab267a7ae53…

MALICIOUS

PDF

80.1 KB Created: 2021-02-28 20:55:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0760c0e574108f42115f6edf392f3fad SHA-1: 011250cad51bcdc90e005a98e85185c5d68a8214 SHA-256: cebdeab267a7ae5343a8a0473c4c56a2dc787459a6ba02438c307a94f3deb90d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, characteristic of a link farm or SEO poisoning attack, aiming to direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs, such as 'https://mezovuduw.ru/strik?utm_term=what+is+orthodox+jewish+bible', are likely used to distribute further malware or conduct phishing operations.

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
  • 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://mezovuduw.ru/strik?utm_term=what+is+orthodox+jewish+bible PDF link annotation
    • http://ygrash.website/libros_cristianos_de_interpretacion_de_sueos0d6a5.pdfIn PDF document text
    • http://smeshnoykir.space/android_4._3_google_play_services_apkkp65m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496148/normal_6004f6d802cb3.pdfIn PDF document text
    • http://metryck.info/1977_dodge_sportsman_rv_specsy8th0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448538/normal_602f83aeced4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466666/normal_600f27ddbfe16.pdfIn PDF document text
    • https://tumopododekup.weebly.com/uploads/1/3/2/6/132696021/jitikaku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501645/normal_603a766548291.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vuraradaso/sutabibum.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/pentatonix_christmas_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/time_management_techniques_for_sales_professionals.pdfIn PDF document text
    • http://kaloruligot.onlinewebshop.net/officejet_pro_8620_e-all-in-one_printer.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/best_android_castle_building_game.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/migovadolas.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/auralux_constellations_apk_full.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE0 4984 bytes
SHA-256: 01bdb0cf06172a63e6c7d1e1c712e04ce9a34f04fc6ad8ff1ddcfcf3be667785
font_01_sfnt_off0000fdfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFD 11940 bytes
SHA-256: 4f121368df13e670f71cda64e15a432e0f68ab7ccbc697c6138a4a74647af1c3
font_02_sfnt_off000125ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125AE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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