Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c2e17508281f97a…

MALICIOUS

PDF

69.9 KB Created: 2021-02-24 05:12:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 9f45f540ceeea5da9d1a90c5780a28ef SHA-1: df2292f014d3248a11df295577fa4c23aadfda8c SHA-256: 5c2e17508281f97af6cd6b9551354c9f02612ebb5b35647b9c15ae7252ed1123
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to suspicious or unknown domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs are designed to redirect users to potentially harmful sites.

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://jottigo.ru/strik?utm_term=cisco+ip+phone+7941+forward+calls+to+cell+phone PDF link annotation
    • https://loxajutuwaguxi.weebly.com/uploads/1/3/2/6/132681393/a5d7ebcc0b1.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/simbiosis_biologia8wgz8.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/lenifefanofowipej.pdfIn PDF document text
    • https://bukodagunotul.weebly.com/uploads/1/3/4/0/134012399/pabub_bepuvus_zoriguj_sigavogekupike.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/tiluwisulepam/business_intelligence_development_studio_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/94046997740.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/42598789893.pdfIn PDF document text
    • http://palakojum.rf.gd/zamirulogefovubobike.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/lamborghini_song_ming._se.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/wijetugotijowewofuvizu.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/bisi_alawiye_live_performance.pdfIn PDF document text
    • http://buwomonemagup.epizy.com/whatsapp_stickers_free_for_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/fleischner_society_guidelines_pulmonary_nodules.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/25545191087.pdfIn PDF document text
    • http://mofagadelebedos.rf.gd/foloferiviwebulogar.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/67764332716.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/11074152537.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/bihar_police_online_form_kaise_bhare.pdfIn PDF document text
    • http://wobirazegezuw.epizy.com/sixeririwesejonunegixeda.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_off0000d24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24E 5616 bytes
SHA-256: 0a46ae28ffde912e4fbabf2c6c39551d769926f0ff25683239f6305f81737efe
font_01_sfnt_off0000e58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58C 10780 bytes
SHA-256: 2ed5c3d97b840c9522f1a63d5ee2772a2aa652a8b3113960f42f8b4b5e0ad7b6

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