Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe61b2a3d26a7b3…

MALICIOUS

PDF

83.9 KB Created: 2021-02-11 21:06:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: db5f39fc5478ed3a13e15cbac3129e51 SHA-1: a6bc17865456a4f5ced7d26c572d689719edceaa SHA-256: ebe61b2a3d26a7b3742b984c9c1235094870803ece5880b83788795720596a2a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs and the document's structure suggest it's designed to redirect users to potentially harmful sites, likely for credential harvesting or further malware delivery.

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 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://bologen.ru/wix?keyword=happily+ever+after+pdf+weebly PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490950/normal_5feb9daa42094.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402280/normal_5fe14f4a1590b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476281/normal_601e162450970.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/modifying_comparatives_worksheet84j9v.pdfIn PDF document text
    • http://wisitens.online/475017402758nknf.pdfIn PDF document text
    • http://lg-copyrightforms.com/carol_of_the_bells_piano_sheet_musici1dox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465127/normal_60172ae8c3181.pdfIn PDF document text
    • https://rimenedefogifu.weebly.com/uploads/1/3/4/4/134466040/7197199.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500425/normal_5fc573a89976c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454665/normal_60069376817b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413231/normal_5feb8f953d3ef.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/sefabe/beloderolisurixipadu.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/roruvas.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/certificado_medico_oficial_pension_no_contributiva.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/self_efficacy_albert_bandura.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/wallpaper_hd_for_android_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/43362609005.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_off000103e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E2 5212 bytes
SHA-256: ffc0d32ae7665974fdc38e3c102d037543ab1a12118bc463d4c0d0ebc2b1c778
font_01_sfnt_off000115b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B8 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00011e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E46 10368 bytes
SHA-256: 8fb30af25a80f20fa5ee8d391cfc890f272e2dfddaa269e5d6be6b96a3bc0216

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