Malicious PDF — malware analysis report

Static analysis result for SHA-256 151ded34c0eaf485…

MALICIOUS

PDF

94.1 KB Created: 2021-07-26 22:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: beedc79bf3342a7db68ab77f479def4b SHA-1: bcc1027fd0368c42a6fa7f2d9d7ed57ffc08803c SHA-256: 151ded34c0eaf485abd5c8e0b504bd01c711cd9e37ae91bb40b0e8088efaa1fb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 malicious score 0.8062

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.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093cb5d58bf7---fowazutadifitefolezizof.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607689897b206---fusofebipazukapimatevira.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/xiwimudotife.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/6250897460.pdfIn PDF document text
    • http://dolinakrzeptowa.pl/public/upload/ckfinder//userfiles/files/jabevivorokebexemapufeded.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/3291d46ddab34cf3e22fe07a386c8500/92610613968.pdfIn PDF document text
    • https://medicabg.com/uploads/wysiwyg/files/85415913819.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/31560419502.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/fubobatozijuziju.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/riwetizonabuxufuguniniti.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/tudev.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/zojirewupawubawefu.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210615163112.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/zaxapixujanumekofub.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/8406c906520040eb5dfe9490c564b2c9/rawuwumugalaxaletusubunu.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160f9fb749e5e5---20385042264.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/era9en7frk38tpch8thepba9e8/34742747868.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/7e5vt41n258k0d9cd30a284u7p/womelolulorazobep.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/16b98b78eb1f30aaa5bce1292d067fb4/fawodibajizub.pdfIn PDF document text
    • https://skillmapmagazine.com/ckfinder/userfiles/files/zizakelojubonazeweragi.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/datirelizujumirutabevibi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b84d69dfc5---19841358813.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/1b900c7c76dc301aa8dea495e9f90fd6/gujuxurexebak.pdfIn PDF document text
    • https://keongracun.org/contents//files/85853224826.pdfIn PDF document text
    • https://maclashoes.it/file/zivadazige.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c56010b69---33674612764.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=juegos+de+primer+grado+educacion+fisicaPDF link annotation
    • 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_off0001156c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D7E 21284 bytes
SHA-256: ea6064444eeb1d6f20ac33b172d946379a00f254af3fa3fdaba980524f6873be
font_02_sfnt_off00016297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16297 10908 bytes
SHA-256: c7a7ee3ce46f06d75562e8a456b0dfac5a2916d7f4bf264901c2665fd30c880d