Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff750fdda858f638…

MALICIOUS

PDF

69.5 KB Created: 2021-02-21 15:22:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 76ebb39cbab0738d5bf1bf53975be301 SHA-1: b2a6e9dd17c7d8c8fbb497040b8e0052fc8d02d7 SHA-256: ff750fdda858f63833180f3c1a6102f9a838cddb91d4c373153e82f1f1d8bf92
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure for 'critical ops hacks download' which redirects to a malicious URL. The heuristic 'SE_PAYMENT_REDIRECT_LURE' indicates a phishing attempt, likely to steal credentials or financial information. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit vulnerabilities or trick the user into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://maypoin.ru/wix?keyword=critical+ops+hacks+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485699/normal_5ff28e13372e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479470/normal_5fccf48214114.pdfIn PDF document text
    • https://nesibebinirudeb.weebly.com/uploads/1/3/5/3/135311353/682d8d763f23.pdfIn PDF document text
    • http://helpcopyright-service.com/bikesilujosutibodibiremas9sd3h.pdfIn PDF document text
    • http://klossheff.xyz/doxazirudivorzvw9o.pdfIn PDF document text
    • http://espacecmb.xyz/what_sign_the_moon_in_today4rfbl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413117/normal_5fc9c24022ccb.pdfIn PDF document text
    • http://simultaneously.space/9252080799361aof.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/rivazixexuguri/dietary_guidelines_2015.pdfIn PDF document text
    • http://mubaviz.epizy.com/juterozolexisexex.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/brawl_stars_pc_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/libanaduvifoxopur.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/gatep.pdfIn PDF document text
    • http://nogosos.epizy.com/free_eulogy_template_word.pdfIn PDF document text
    • http://direpedokelazal.rf.gd/submit_button_outside_form_react.pdfIn PDF document text
    • http://lejemerane.epizy.com/sistema_endocrino_organos_y_sus_funciones.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_off0000d4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D1 5220 bytes
SHA-256: 30422df26b288ea872961cafab8c1494d2656a2563dde1a6dbe78713d9f2ad3e
font_01_sfnt_off0000e696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE696 10196 bytes
SHA-256: a83066db42a389f02f88f1223914f832902f542254c141f1bafa86fc9e5ba532

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