Malicious PDF — malware analysis report

Static analysis result for SHA-256 274c267c53aacdfc…

MALICIOUS

PDF

148.4 KB Created: 2021-08-06 19:26:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 4bcc6bedaa90fd79f28989b8c011a10e SHA-1: 3d7aa430be8ae2d45e9f9615f7120e4e97dc8a82 SHA-256: 274c267c53aacdfcc9fab5b4456d04bec6a58675adb787110f5fd98e82bc570a
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 0.2613

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://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/1295968789.pdf In PDF document text
    • https://harkakotony.hu/UserFiles/file/mebinokewidixarejolepa.pdfIn PDF document text
    • http://duralinealu.com/upload/files/misatusukibipimom.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/qsce1tto83n457ot06r6pfinr2/22578344678.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/83459666025.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/mojumokiwofepotus.pdfIn PDF document text
    • https://datajournonepal.org/files/94145527401.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/18238778486.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/lufulodofanaxudusuwike.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/47694234383.pdfIn PDF document text
    • http://franklinbristerharveyfamily.com/clients/a/a8/a8910385c57dfddac3c6311e2bd1422e/File/50897966647.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/11812421083.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/d827fbc00237d20bf1ee2f9d70192c86/79510310572.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/69285697625.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/kimabomafuwalikiv.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080536296b43---87620429872.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/36e9a7a7d1ed0ff61e5ad64382be6200/moxozasurofaxa.pdfIn PDF document text
    • https://claudiodituri.it/uploads/pipubozuvugukoxoxa.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/74095046827.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16083cfaa0c962---xinevajuf.pdfIn PDF document text
    • http://eraldocomo.it/userfiles/files/pabewixijavejufugidokaxaj.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ef7aace1c---nosefenijuga.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607638525297c---rurajafoxera.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/73035789044.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16082e3590fcc4---dobotoj.pdfIn PDF document text
    • https://parkettworld.com/upload/files/24061287363.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=rodr%C3%ADguez+valencia+joaqu%C3%ADn+sinopsis+de+auditoria+administrativa+trillas+2001PDF 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_off000207cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x207CD 19132 bytes
SHA-256: a3cd62366859efa8322e7921520335d4ab59886b5cdb7b39626bed3d1df1f009
font_01_sfnt_off0002388d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2388D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1