Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a3c7d2fe8845adf…

MALICIOUS

PDF

76.3 KB Created: 2021-09-02 15:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 00adf898cab1a3c04d6b6fc8d0b5af1f SHA-1: b1d4fedc6c87845f719e75330b38adbc914a9d4b SHA-256: 6a3c7d2fe8845adf3c3d7080d0c57ffd0dd7894df67be90f2d32b029341f6a4b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4602

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://oniceh.ru/uplcv?utm_term=the+land+of+stories+book+1+pdf PDF link annotation
    • https://www.ijmsir.com/ckfinder/userfiles/files/gigukagisewob.pdfIn PDF document text
    • http://fxmeat.com/upload/file/3a3a972b56d86d2db9c957d0fbbe61ef.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c62e940d0c3---lixudojep.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/panagipamifuzuw.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/fezikonedugafubovigo.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9e13c5f58501118c152946c35efd732e/40619944215.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf844e99ded---pudabenojagogeno.pdfIn PDF document text
    • http://araonline.hu/uploads/file/75742302737.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ffc88b50b---gakevorigipifojapusu.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/duduvixezazejol.pdfIn PDF document text
    • http://atomleasing.ru/media/File/zekaw.pdfIn PDF document text
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/ladexumajupasofogatipinut.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/dexixo.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b446ff2b0de---13248018361.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/ganiwexosekopovuwisibazi.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16092995ece8da---18508758516.pdfIn PDF document text
    • http://kramnyca.info/img/upload/editor/file/52246748159.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210507041742.pdfIn PDF document text
    • https://ourcampuswindow.com/ckfinder/userfiles/files/pupitagisimidevobaxu.pdfIn PDF document text
    • http://chsjackets75.com/clients/a/ae/ae1e0d6431e3080ad3d3eb1024a27f31/File/16766591033.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/f98055e8ea1f57c3557405c1abda3e34/mutoguzogunusatawopurufu.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1727e641355259565becee7607262225/42022280295.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc5c20ff7c---42906976231.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_off0000d229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD229 10840 bytes
SHA-256: fe96434aeb73bbc4b3a595038a710a8c873bb4db00ab915020fe98a913b755c3
font_01_sfnt_off0000eaea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FC 18716 bytes
SHA-256: 3f377da4c7353dd25bf922d3a8b49e35b20487d76fefbe7783cab52c97a6e086

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