Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0e2e1a51054e88…

MALICIOUS

PDF

85.5 KB Created: 2021-08-01 05:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5404148e02e52b15c3e14ec5f5389191 SHA-1: 140fce1998dc84c9186085bcd345303ba97955ae SHA-256: 0d0e2e1a51054e888c52f82ed954ad6ac55291a87fd9287c17f10c9ccc5123f5
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to websites that appear to be part of a link farm, with several hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL analysis suggest a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.pattyn360.com/upload/forum/files/39824180563.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788e920f156---7564144370.pdf
    • http://cayxaotamphan.net/userfiles/image/file/88823015298.pdf
    • http://heizler.hu/files/file/zukar.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071158bcb371---48396923764.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/r3o0p8822alu3ncksgffjaeupc/gisupavazofirebixuvabozot.pdf
    • http://elsekmont.eu/userfiles/file/88374607506.pdf
    • http://tareeapartment.com/user_img/files/14651468881.pdf
    • http://dblbtech.com/userfiles/file/97979083593.pdf
    • https://itracmediav5.com/ckfinder/userfiles/files/5232362469.pdf
    • http://entryexpress.online/chapter_images/files/97381175519.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608d14b1db648---249354474.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e715f88fb6---31482125210.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4247284e7---99222843679.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/ou5giagd6q6vr2fvnf287e3si3/85940052734.pdf
    • http://stepasidemedical.ie/images/uploads/file/jomuguzininuvasen.pdf
    • http://axwelindia.com/uploads/bimulirudorumuxogubogidu.pdf
    • https://vegastel.eu/components/com_mijoshop/opencart/image/data/files/97316783638.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/eb655c5002269f0a5d26ef24640de702/tagegepodiwapedewom.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607233495447c---90435998911.pdf
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44142076169.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc31c7e683---80132210752.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a735b43cf83---xikek.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b4d8a4de2---tavakos.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/0e3f92aa4fe5e22b1b88b999db7bf68c/42336003751.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=sistema+di%C3%A9drico+ejercicios+de+vistas+nivel+elemental+resueltos
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e61d.bin
8144229fa0de732ac36d3c41b7ef32bcfc816316c22c6808573a84f7ba620131
pdf-font-stream PDF embedded font (sfnt) at offset 0xE61D 11056 bytes
font_01_sfnt_off0000ff85.bin
9ded92dee47f3ae4d3e0acbb114ae52dddc9fbff25252e305fbdc526dcd9f280
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF85 17672 bytes
font_02_sfnt_off00012c57.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C57 16792 bytes