Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ca914199a03aa2…

MALICIOUS

PDF

70.5 KB Created: 2021-07-15 21:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f011dd995ce63bf11d263479ebca803f SHA-1: dfd58958ccc399a96a3a4b3abda42fdd23f93c2f SHA-256: d1ca914199a03aa20bd4697737bffd799ffa7d2349eaf245a7ef02a8b11dc71c
154 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and link farms points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6872

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
  • 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 http://bogelaipigeon.com/upload/file/viliwesi.pdf In PDF document text
    • https://akemi.ro/hirek/file/kezisadafapajisumubuwesu.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd1062807f---22910451632.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/volatofuzuf.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/c030d48b05d19aa8480216ea1046425d/82523367690.pdfIn PDF document text
    • https://ivanamihic.com//files/situpudide.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160d0594371241---12031539102.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/2240163627.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/lojomumimutasalijexiwot.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/rttcgpc7i73u715b5uu9legme7/kodipuwanisoji.pdfIn PDF document text
    • http://aplus.to/userfiles/file/37840516350.pdfIn PDF document text
    • https://sofanet.ro/ckfinder/userfiles/files/39844531520.pdfIn PDF document text
    • http://0965818789.com/CKEdit/upload/files/31239236810.pdfIn PDF document text
    • http://mutamobilya.com/images_upload/files/75640001722.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/464319ae29cb86fe907ed2679533f439/muwod.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/f7bbf7dfb5c0bd9510bcb678792a7809/fezutexetodezowamitonike.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840f822fcd1---10610356381.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b0681f1bc---70322844289.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/e1cbac5aa6fab41c2ae5c505e1ee8760/vemopuwukibawodex.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160703a65a9fa0---vefoniz.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/52518277433.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/f0a54e152277db737ce04e4293f2f0a6/poxidomigetubogemexiviv.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/d2ur7otolugu62hqfmjcm7s4al/17787982051.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/21738595756.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/41651488548.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=advertisement+in+malayPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF5 16904 bytes
SHA-256: 00ace8337abedc376830d004844be3abacaecdabed586a31a6b989dd301caf8e
font_01_sfnt_off0000f9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1