Malicious PDF — malware analysis report

Static analysis result for SHA-256 6940cdc308264944…

MALICIOUS

PDF

77.4 KB Created: 2020-12-21 10:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fb0d63b5f21c9451f0395f58cce2e106 SHA-1: 70ad690ca23ae113a40c90c225acfbd935fdc323 SHA-256: 6940cdc308264944d4c87972cd808a75dcb573a0635150c92f0feae64a613492
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and has been flagged as malicious by ML classifiers and ClamAV. It embeds a URL that appears to be a lure, disguised as a playlist, which is a common tactic for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/strik?utm_term=summer+party+music+playlist+youtube PDF link annotation
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/6393504.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc572e82cf09257bd8a3d2d/t/5fc6be1fb7521d608a2d96d3/1606860325183/fingerhut_mobile_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebbdc37f-1a0d-41f9-9e94-6685f7ab5567/skyui_error_code_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f71f90ed-5a96-4835-aa68-3378b7e184ba/neighbour_from_hell_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcf38858-577c-4634-88cf-2f1781eb51e7/4603483925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af9bdd26-4ae1-435b-afb6-5f2ce37d27e3/101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21c480c1-7e88-46f9-a0e3-094c74d1071d/iberian_peninsula_political_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/143a8cf2-0767-4295-96f0-cf45760e62ad/intune_doterra_ingredients.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08a23352-072a-4f99-b0fc-ddf3a40c91e9/8129693105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5ac3397-efa7-4df8-b2e8-ddbfbbbadb48/kunisubizuzaworodos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be510b72-a570-42c0-bd64-a1f6d7e80739/what_is_called_thinking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4165b8c1-2637-421b-997e-dbfb2b1bd667/50598155556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1419243c-6197-4c0a-939d-453356c0d902/2018_nascar_tv_schedule_printable.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_off0000eaca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACA 5424 bytes
SHA-256: 5081023f8478c5d8a3448ab6dcebe369bd1995bc7fb962eb149d4cdb0a399493
font_01_sfnt_off0000fd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD24 12896 bytes
SHA-256: 0466b269fce84f3acd19cad8689b473310899c94912042ef1467e30f2f839841

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