Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce60a1aa4bae170…

MALICIOUS

PDF

67.3 KB Created: 2020-11-29 18:10:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e37b363bcb6a55bc15f6edadbce089cf SHA-1: 18aac58e8c24f830eb3e7f168497ab11a779e522 SHA-256: 2ce60a1aa4bae1704b554b1e6532d439835d0912354d83f0ee016b03ab2ddebd
196 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it contains a large number of external links, potentially for SEO manipulation or to host malicious content. The 'SE_BROWSER_INSTALL_LURE' heuristic strongly suggests the document's purpose is to trick the user into installing malicious software by posing as a necessary update or extension.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://trafffi.ru/123?utm_term=utorrent+add+magnet+command+line PDF link annotation
    • https://sivagodumojuji.weebly.com/uploads/1/3/4/2/134235915/7666504.pdfIn PDF document text
    • https://disadaniti.weebly.com/uploads/1/3/4/4/134463451/5312371.pdfIn PDF document text
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/gipij.pdfIn PDF document text
    • https://paviliwele.weebly.com/uploads/1/3/4/4/134489687/f0213a74.pdfIn PDF document text
    • https://mawepalutolura.weebly.com/uploads/1/3/4/0/134040672/4321139.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/zirojopemup/bujimewipevuwofetituromol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f28e823-3773-4e9d-a325-6469410c8dac/nelenisozifegokidam.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/aspera_connect_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/infix_to_prefix_java_code.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/books_at_1200_lexile.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/background_research_plan_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/train_tickets_from_rochester_to_nyc.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/90260751632.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/turbo_slang_tablete_za_mrsavljenje.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/83669131869.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_off0000c867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC867 5072 bytes
SHA-256: 39fe9310da7475d179ccbb2b58f3a988c9b95c4e32311ee694488ed665050183
font_01_sfnt_off0000d993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD993 11588 bytes
SHA-256: a04473b3af265b1917281369e5ca6ce7e7eb93e11f9d2c751ad7b26f351b0efc

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