Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b44d58aa121809a…

MALICIOUS

PDF

78.1 KB Created: 2021-09-21 07:38:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 378485129a6d2beec806fdd7cbb39f41 SHA-1: 722375d4ac4bb7f75c4e2f5235ce08f85f86658e SHA-256: 6b44d58aa121809a814f36e21170a9590186d8cded51dd47ae7e928f52935bbe
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with a Pdf.Phishing.Trojan signature. Static analysis revealed multiple heuristics indicating a link farm hosted on compromised CMS uploads, with URLs pointing to other PDF files. These findings suggest the document's primary purpose is to act as a lure, directing users to external malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3586

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://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614123bd24b6f---pagenojikowezaraxakum.pdf In PDF document text
    • http://healingtown.org/userData/board/file/29325712713.pdfIn PDF document text
    • https://carlojans.com/cms/file/kideguwixuferakidavapufi.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/96979353903.pdfIn PDF document text
    • http://alothongtin.com/upload/FCK/file/gifitazesetaxabigawirugo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143aacb0f501---zovevewivegi.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202109210229516335.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/68181290342.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/bodifajumo.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/76380815499.pdfIn PDF document text
    • http://asliev.coco1490.com/upload/file_folder/file/wajoxevuz.pdfIn PDF document text
    • https://citytrafik.nu/images/file/temalozipatodije.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/23957270654.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/51040987447.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/41928036565.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea5f11f9b6---5118104424.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/141929948.pdfIn PDF document text
    • http://itps-group.com/uploadfiles/file/jewukadumevisabuw.pdfIn PDF document text
    • https://alshuka.ps/ckfinder/userfiles/files/fetutanejuwalelelonodema.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0ccad947b---wutowinaworakaxeriv.pdfIn PDF document text
    • https://thietbivesinhsonhoa.com/webroot/img/files/33062488410.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/lerovixodavimitagezen.pdfIn PDF document text
    • http://ahzgbh.news-read.com/upload/files/22619076697.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/b2640c3e2ddff8e472756eaa7d6ea75b/50787683083.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/13736514541.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents/files/befirekoxidarurutanev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=best+video+editor+for+android+phonePDF 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_off0000ecd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E2 17832 bytes
SHA-256: e446d8c8e65beff9ab96fcc78864c9da85e2133f110ccf882fba0676e7dbb8ba

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