Malicious PDF — malware analysis report

Static analysis result for SHA-256 384215ac38fedea6…

MALICIOUS

PDF

59.7 KB Created: 2021-06-21 04:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4a4dd0426007b7e4991dce69422aa0c0 SHA-1: 049357a3f39a8999d7491f125d448f12dd6841e0 SHA-256: 384215ac38fedea647e0b5af08380b76afe62a2cf71bd05a30b36bd4710c654b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9539

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://refour.eu/wp-content/plugins/super-forms/uploads/php/files/2b22aedb5b25b06e33dd7ce93d8c81a9/73217255758.pdf In PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/bc0529ec09e80b6d69cc81dedb2c20c7/dekunadowotajup.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/d6cfad06c6c11aba265702792ffab2bd/tapolaj.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/89205519501.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2c09d85a7---vuxegodexapajuj.pdfIn PDF document text
    • http://german-ex.com/87861489665.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/1467038024.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/f0a8904549e82a3d46a2427997798cdb/benisojati.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/7cafc2df9277a44ead4436a622067fbd/44934155460.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16093f8dae04d5---89177434338.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/deroribijawuzat.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d44909f519---gedavuxodupabapotuvujajok.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0106dca60---rejigu.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/qef9tk4iktm5ss3me76f1ac3pv/72418674750.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=linear+algebra+and+its+applications+5th+edition+pdf+free+downloadPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE46 5712 bytes
SHA-256: 4d5ff183a43e6526c9729fecd0c7d5e25c530a70f5c2c5ae451900303026d7fd

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