Malicious PDF — malware analysis report

Static analysis result for SHA-256 673bea49634733cb…

MALICIOUS

PDF

66.4 KB Created: 2021-06-08 09:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 08afa05024a31cb1ee7f35d2ba586e24 SHA-1: 3b05320fa7d617670e1119b1e55a0a8ddddbebca SHA-256: 673bea49634733cbf12d2262edaf0a7c471ee242a64ab896226f667e4ae6bf92
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9227

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://irlanc.ru/pbw?utm_term=acido+nitrico+forma+molecular PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366007/normal_6065bf3570932.pdfIn PDF document text
    • https://rowusebejaron.weebly.com/uploads/1/3/1/6/131637242/zuzagumepuvor_tewela_febiwunuxel_logaxolo.pdfIn PDF document text
    • https://miwugurelogubu.weebly.com/uploads/1/3/4/0/134000151/9538835.pdfIn PDF document text
    • https://gawugabel.weebly.com/uploads/1/3/4/3/134361726/kofatopupeb.pdfIn PDF document text
    • https://wakuwuwosabi.weebly.com/uploads/1/3/0/7/130776519/xiputoduvebap-kabijelumog-damugo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486051/normal_6064e14a8272f.pdfIn PDF document text
    • https://xubedemowixur.weebly.com/uploads/1/3/6/0/136004279/8509881.pdfIn PDF document text
    • https://lokowukaf.weebly.com/uploads/1/3/4/3/134315315/7f5140d3e735790.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452376/normal_603b801a10537.pdfIn PDF document text
    • https://bafupenog.weebly.com/uploads/1/3/4/1/134131575/9f5ca4a.pdfIn PDF document text
    • https://lekamenofujilap.weebly.com/uploads/1/3/4/6/134690267/6520360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461766/normal_5fe7cf649992c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccc6f50f-3d36-41ce-80b9-05b49d5ff1fa/se_puede_hacer_una_prueba_de_embarazo_con_sangrado_de_implantacin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1178e28f-7e9c-4964-a4dd-1bbfaf270d28/dave_ramsey_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb3d38f-be48-419b-bdec-00b88685509d/how_to_prepare_for_ielts_speaking_exam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c72f7c8f-62ff-4c82-945c-398cc2938158/61367287041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27f95578-8715-4e92-8190-1ac2d20231fb/xipatokolasumijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d9d228b-cb44-426b-8cd9-649a886ec719/76109316345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a8603d-081c-4b35-b220-df4995f65784/la_ciudad_y_los_perros_de_mario_vargas_llosa_obra_completa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e5914d8-4db6-4363-8992-45e2908ad4f6/802250495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81abcd7b-8e70-4293-b8bb-7f6891dc24a7/likafukej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbfaece6-3466-4538-9259-5f5ab569a571/18638913878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6551ab9-58db-4077-9a13-9e901ad7c0d3/business_analytics_course_in_usa_without_gre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efa4b48b-56c6-4bdc-b93b-bc0a71f880bb/vusadepowifufufadudikib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cad3647c-61fc-4f07-8865-c901c74bdb1d/weiser_smartcode_10_instructions.pdfIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D7 6492 bytes
SHA-256: cf6bcbaf462759e04676f8989e7e87ed4d43c4317550ddbd0c5684ab0bd17b73

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