Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c9fa4cf12e10a5d…

MALICIOUS

PDF

85.0 KB Created: 2021-07-26 03:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 43d6c4dfa13bdf1b51697bc5d671ac37 SHA-1: 1ed5927bff93748b2757d436e68f5998b7b3490a SHA-256: 5c9fa4cf12e10a5d0c28cc7538d16abeb3e8832011feba560340ea5ad943e5e3
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/27128699461.pdf In PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/02fa626afb89c6f9478d7cc9eea7b696/28226620288.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/nekirapun.pdfIn PDF document text
    • http://nena-artspace.com/ckfinder/userfiles/files/fapodevugowu.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/d50c5f075b67538e303a5b212f155a6b/97999331593.pdfIn PDF document text
    • http://forresterfamilyreunion.com/clients/c/cc/cc72bfd2512333311cc1ef5a4fdef90f/File/35088968912.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/roziraxarapeken.pdfIn PDF document text
    • http://muntepa.com/userfiles/files/236216165.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/98073718235.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210726_9b3b2.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f53308c75---32352603162.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/pak4s2oegh2s20ig3f6c1krlh3/fibelogasukuvenoguromo.pdfIn PDF document text
    • https://cecprint.com/images/file/24376952243.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160960166cf2a5---sofik.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c51e4869a27---60720677045.pdfIn PDF document text
    • http://sgpeo.pl/users//file/kesiwupetolejulixesu.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/7a8c610c801296b864120f6a920ee245/46233585439.pdfIn PDF document text
    • http://bjjiffy.com/upload/tafipititurituxesolid.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/654ab9713cac9e20c0d1a01bb0aa3983/44580436384.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f95a9199c27---96131692639.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/ed673d851e374988afcefc2a5928c325/29525132504.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/0a12d7827dd9c1b67840f8116c197f24/88135606624.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/fubuxemetojov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=calistenia+en+casa+pdfPDF 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_off0000e99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99F 10424 bytes
SHA-256: 8f3ec972c95c022047b631307b4510541735ee1b360b286bcab5e34d24c978aa
font_01_sfnt_off0001015c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001196e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196E 17340 bytes
SHA-256: 9dd9930754f0a56e07e94a224639b10a0f3746ea81597a43ef3c5a317f1c031d