Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9bceb3a2309f58…

MALICIOUS

PDF

74.4 KB Created: 2021-09-19 03:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 6062429716f886cb7c07cde78de3769f SHA-1: 2d22713700727428ea0b1de6bb15d26897e767eb SHA-256: 5e9bceb3a2309f581ccd6613056b0f4b976d202dcd28df0c2c9709fccebd1d32
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138fe9cd3f75---xefebulafuriv.pdf In PDF document text
    • http://ivankotov.ru/img/lib/file/75451029324.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/46677772108.pdfIn PDF document text
    • https://buddhaart.in/userfiles/file/1604175086.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/zojapajafutazalavibebifal.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/020bcb3aa32089c706d9980b64697f40/dowixusafedizudoreme.pdfIn PDF document text
    • http://vinmexindia.com/uploads/32404909777.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/bosetadovupinuxodimodeji.pdfIn PDF document text
    • https://nacituran.com/userfiles/file/24055279852.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/vakezawexiri.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/92309763153.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/50339576917.pdfIn PDF document text
    • https://cs168.tw/upfiles/editor/files/tapulebel.pdfIn PDF document text
    • http://ch-bovi.com/upload/files/tozapigezupek.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139549aee74f---gimud.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/95370377499.pdfIn PDF document text
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/fibire.pdfIn PDF document text
    • http://pate4me.com/userfiles/file/60293068951.pdfIn PDF document text
    • http://zsmnowakowski.pl/userfiles/file/60566854122.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/dorofol.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/tejeroforatugux.pdfIn PDF document text
    • https://snapstudios.ca/userfiles/file/30687034641.pdfIn PDF document text
    • http://chayka-svg.ru/files/nakejinarolewiforubeba.pdfIn PDF document text
    • http://detskypohar.cz/upload/file/97781017942.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/rovejevamarasara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=dark+crusade+cheatsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000c0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E5 10296 bytes
SHA-256: c76140a05fd9c7eb5c78d28dbcb9b9dd7827ff8345e565738bdbd5e38e865801
font_01_sfnt_off0000d84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84B 17140 bytes
SHA-256: 886d1fa4791e0ef5e2eece1401944cd6935926eaa62fafec68e944f175676a82
font_02_sfnt_off0001048a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1