Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9a968465c3809a…

MALICIOUS

PDF

74.0 KB Created: 2021-03-04 11:50:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 8d108bd2ce66f0b147c3a2eea9a64d26 SHA-1: 7cd635dde85029c29ee7064b08de1950f8264c96 SHA-256: fc9a968465c3809a31342b30e7738bedf28add0601748668aa21fbad96a73d73
164 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious intent, including a large number of external links and a ML classifier flagging it as malicious. The presence of a 'download button' lure suggests a phishing or social engineering attempt. Although no scripts were explicitly extracted, the PDF structure and external links are indicative of a downloader or phishing lure, potentially leading to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://mezovuduw.ru/aws?utm_term=dell+precision+m6800+drivers+windows+10 PDF link annotation
    • http://nadipewin.mywebcommunity.org/que_significa_orando_en_el_espiritu_santo.pdfIn PDF document text
    • https://jasujidavoja.weebly.com/uploads/1/3/4/7/134770870/fozikukore.pdfIn PDF document text
    • https://kojurivaxudofug.weebly.com/uploads/1/3/2/8/132815346/gakife.pdfIn PDF document text
    • http://bajesiradevo.getenjoyment.net/the_odyssey_book_10_summary_shmoop.pdfIn PDF document text
    • http://giwosoto.sportsontheweb.net/62760562993.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/wunojipu/jabukupewameda.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/philips_voice_tracer_dvt2510_volume_control.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/what_affects_enthalpy_change_of_a_reaction.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/what_is_an_example_of_sentence_structure.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/eyewitness_rocks_and_minerals_video_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/10601448161.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/wireless_n_repeater_wps_connect.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/bloodborne_wiki_guide_ign.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/73677249057.pdfIn PDF document text
    • http://desejole.myartsonline.com/fikeravurebijunoloj.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_off0000e295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE295 5700 bytes
SHA-256: eaa17eacbc33317c64986e56c012f1d34e4bd02aa9e245c39da6159b36033235
font_01_sfnt_off0000f60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60A 11344 bytes
SHA-256: 912dc98ac87d85232e67b061cfca3859b631bc33b27aa28714ade23dd65aada1

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