Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad28ae5d1d89e550…

MALICIOUS

PDF

89.9 KB Created: 2021-05-06 11:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b73866c08f2313caecd2b7e95c70f594 SHA-1: 557aef61b28e490d6ac41f935ef9801764fad0c9 SHA-256: ad28ae5d1d89e550fc07057241ae76430ff8b45b670ed764c186263acf78aa78
156 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=othello+act+2+scene+1+pdf PDF link annotation
    • http://zakofim.iblogger.org/cancionero_catlico_partituras.pdfIn PDF document text
    • http://fortuneo.biz/xanowarixasipogudb2uwl.pdfIn PDF document text
    • http://esportzmlevent.com/xisobulawivuwaddci4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382613/normal_5ffe64bfe7b3a.pdfIn PDF document text
    • http://jeruxawi.iblogger.org/material_dashboard_pro_angular_2_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366335/normal_5fc91821a6415.pdfIn PDF document text
    • http://yarrebitteh.online/tujativelokidokax2eode.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479688/normal_60319698bca38.pdfIn PDF document text
    • http://1eyvgo.xyz/download_game_tank_io_mod_apkpz3e2.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/fasomusogapovi/77199855965.pdfIn PDF document text
    • https://56076a71-1b70-41e8-afe1-d547c394b4ee.filesusr.com/ugd/ab0d05_9f566d931a4646db86a48a1837227d67.pdf?index=trueIn PDF document text
    • https://8bd0dbf5-62e0-4684-a95a-1d9666dfa34a.filesusr.com/ugd/e71694_6b15586e3056415f9425903818f0ff29.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazixipame/xatafom.pdfIn PDF document text
    • http://fevusavumerow.rf.gd/31690894480.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/wugewime.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/manual_campana_extractora_challenger.pdfIn PDF document text
    • http://vanowawupusizi.rf.gd/28163648432.pdfIn PDF document text
    • https://4a1fbaa0-0e67-401b-a466-96699e2e5642.filesusr.com/ugd/9647bf_e431ffe5ce1147b490871a586cd65a06.pdf?index=trueIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_0da319a4d51045878abc66e9c4a947f8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/80360995231.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/edit_email_template_outlook_2016.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_off00012440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12440 5360 bytes
SHA-256: 6a2761f9b12e936db58ce74c5ce1db219e745fe6fe3a43ff81d2b6603851e218
font_01_sfnt_off00013681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13681 10508 bytes
SHA-256: 204249248357177d0810b0a378a92ffc0a14d9fd81e0590a5df21640f5ba8517

Open this report in the interactive analyzer, or submit your own file for analysis.