Malicious PDF — malware analysis report

Static analysis result for SHA-256 6805ffb201c33d8c…

MALICIOUS

PDF

65.0 KB Created: 2020-12-22 18:30:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e885199a626d44aaf36ad962f41c49ff SHA-1: d06e1bfa540a0cff91f2c87f328672a802cb280b SHA-256: 6805ffb201c33d8c849d86c4abc4ca699b09a544ec05e184a376169bd41307d7
156 Risk Score

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 0.9996

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
  • 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://trafffe.ru/strik?utm_term=lego+star+wars+the+force+awakens+revdl PDF link annotation
    • https://tirotulesi.weebly.com/uploads/1/3/4/8/134849952/tilakenawunefe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3ea2233-50af-44ff-b216-a7206060b161/milaxilenu.pdfIn PDF document text
    • https://s3.amazonaws.com/suzeduselu/la_enajenacion_y_la_asimilacion_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de1feed3-72cf-4b2a-8fbf-dd6221b732ef/gottes_stern_leuchte_uns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c79a4e4-ae6e-4f92-8678-d5104d570dcf/69360538545.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/wofudarajuvas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb4269d7-dcbe-4e9c-a9d7-474b7d963f5f/6827137800.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/87961976438.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fde987dd61098631976af48/t/5fdeebbfa478394ebcad8f23/1608444864425/apersepsi_dalam_pembelajaran.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ff00e6-d785-47e5-af38-a4e427d65651/kenmore_coldspot_model_106_manual.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_off0000bdc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC3 5440 bytes
SHA-256: 387f7754ed7a6be8be0711560a79d3739099c5c239096f48750a7fdf1050f80c
font_01_sfnt_off0000d063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD063 11356 bytes
SHA-256: e33d4adf2505d9a6e4618e857d2862fbfa401f6a2dc390a61f13855cdc8c1066