Malicious PDF — malware analysis report

Static analysis result for SHA-256 f50bf6e8b7a61c30…

MALICIOUS

PDF

73.2 KB Created: 2021-03-20 12:16:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: da31bba25df3b43296aa64dcca7ed855 SHA-1: 933edfaa2821668ee2d559bfa275ff791842b0e9 SHA-256: f50bf6e8b7a61c30b1cc32cbdc18d2cc097b28b2bfca25652c69c43fbe9f1ffc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The primary attack pattern involves a link farm of 30 external PDF links, likely intended to direct users to malicious content or phishing sites. One of the embedded URLs, 'https://soxebez.ru/strik?utm_term=the+lost+years+of+jesus+elizabeth+clare+prophet+pdf', is particularly suspicious and likely serves as a lure.

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://soxebez.ru/strik?utm_term=the+lost+years+of+jesus+elizabeth+clare+prophet+pdf PDF link annotation
    • https://sikowegapewabi.weebly.com/uploads/1/3/5/9/135975971/gedofax.pdfIn PDF document text
    • https://ribovaboj.weebly.com/uploads/1/3/0/7/130775049/5148598.pdfIn PDF document text
    • https://cdn.sqhk.co/budotedo/MEgh4ic/57878654865.pdfIn PDF document text
    • https://bisubobotikimix.weebly.com/uploads/1/3/1/4/131438323/deaa7bae5989.pdfIn PDF document text
    • https://revogofoti.weebly.com/uploads/1/3/3/9/133999152/5082299.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/PXojjJt/watercolor_happy_birthday_pictures.pdfIn PDF document text
    • http://abistrans.ru/xbox_360_xbox_live_sign_up_errorbyesz.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/30652287770y7597.pdfIn PDF document text
    • http://habercigo.com/kuwuwavotagawidifopokofbwks2.pdfIn PDF document text
    • https://jubibololir.weebly.com/uploads/1/3/2/8/132814038/muxemojuk_derirogu.pdfIn PDF document text
    • https://fofifiso.weebly.com/uploads/1/3/4/6/134613093/bibozuzovaj.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/rovikibixu/playground_ar_stickers_apkmirror.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6e4fd8f-3962-406a-bf80-d52e7d43b6bf/cinemax_nitra_mlyny.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/schengen_visa_application_form_kenya.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/92678639430.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/dujiwaj.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/tetefenikerodawomipoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08c691b0-14ca-4333-8574-2681e14eab3e/zekubofurenuradosufuj.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_off0000dfff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFF 5560 bytes
SHA-256: fa9b1400a8b4ff6119ad807f3fbb6bd083be5b293623aeb00487e5f244e1e0ca
font_01_sfnt_off0000f2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EB 11008 bytes
SHA-256: ab0f10f068d8c86e72c820bc028c811e29f8b4b5fed60cf0bb60f1f838840761

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