Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc253c5fe54610c…

MALICIOUS

PDF

64.8 KB Created: 2021-02-14 07:28:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 07a0b8ae5ef7434d7033bdfaa58b200b SHA-1: 9c11490696c595fec406db344412b1dfca2fdbc5 SHA-256: 8cc253c5fe54610cac09a6eb39df1d5cb948bdd8841c47ffb278e768573fed85
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=college+inn+broth PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379726/normal_5ffe29d7c2b1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450883/normal_5ff447667f163.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365998/normal_5fccaa3c5069f.pdfIn PDF document text
    • http://kanshoper.site/kenefogetidomamube7hnwt.pdfIn PDF document text
    • http://reduslimer.website/25494962280b08qe.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/4wib1N0/kanewilusoroforafijobu.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/ligeia_edgar_allan_poeriyti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446170/normal_601dfa99804e1.pdfIn PDF document text
    • http://legendnat.space/recogida_de_basura_bloomfield_njmxf5a.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/kigavanus/zusakulelojenup.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/right_lentiform_nucleus_infarct_symptoms.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/lilexowokujibawekogupim.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/korexepivozegitelofikipak.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/pageant_judges_score_sheet_samples.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/blockers_spy_for_instagram_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/48748674764.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_off0000c326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC326 4604 bytes
SHA-256: ec216402e5705e84aaa4081abf29e6f7acf91696aca5e23a999c91fe5ebace05
font_01_sfnt_off0000d2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CA 10876 bytes
SHA-256: 4babf3e2bd62bd623ff2c550d8aa597fe849ca026d88abb04fcf588b707a06ad

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