Malicious PDF — malware analysis report

Static analysis result for SHA-256 93cd55177515d77c…

MALICIOUS

PDF

73.0 KB Created: 2021-10-16 06:32:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 227a69803cb171d5a796336ccdd66212 SHA-1: 519c55c7020ab06192e11b3669c0fdf8503223e5 SHA-256: 93cd55177515d77cf98e1af0451d924fd4f09778393bdbf0a983575b7955dc1f
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on compromised websites. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6144

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 https://kamarkosong.com/contents/files/wezibuwekode.pdf In PDF document text
    • http://eecca.stocker-development.com/uploads/ckfinder/files/34178287298.pdfIn PDF document text
    • http://thaoduoconline.com/userfiles/image/file/70019089019.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/3ec18986cacc061f1b053724affc23c9/70128745352.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/42225916763.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/80423969361.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/newuk.pdfIn PDF document text
    • http://satcomlink.com/userData/board/file/74152960101.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/gexojisijevenulaj.pdfIn PDF document text
    • http://crm333.com/documentos/file/menusof.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16133427c1dc3d---vamik.pdfIn PDF document text
    • http://signauction.net/userfiles/file/tididawaninu.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/16426240831.pdfIn PDF document text
    • https://supermovi.com/userfiles/files/nepavafopapapatojunuti.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/40978206496.pdfIn PDF document text
    • https://avflash.nl/upload/files/kolopuniberelosafe.pdfIn PDF document text
    • http://rc-saty.cz/gais/image/file/bujoxutebivesiwewakiw.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/161503a8be524b---24228278118.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/44b22531ede7d61472403344bb3d92ac/wogaxe.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/70897814225.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/xabotokif.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/wawudikogetiwoliwuxivudu.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/dofivipodapabovimowejiwo.pdfIn PDF document text
    • http://kemnhapkhau.com/upload/files/tijugimikirowilefevu.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/6Zflnl449io/uplcv?utm_term=watch+howls+moving+castle+onlinePDF link annotation
    • http://louisiana-arts.org.s150269.gridserver.com/siteuploads/editorimg/file/27546672210.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A3 17576 bytes
SHA-256: f0a36e2421ddf57c200c051f8294e5e880bd79d6e3ca0165cd030ec3842f2165
font_01_sfnt_off0000f592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF592 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA9 10720 bytes
SHA-256: 48325c0e7c6acfe601d8ec81ab1f5ffb94f809411a83080eab8724fcfaba5f48

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