Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d7be5400af3c49b…

MALICIOUS

PDF

92.7 KB Created: 2021-07-02 06:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 467a2b4717df4f8a6561b63dbc4fc4b2 SHA-1: f6907ff457910cd2bf4808e787adc5041c241a7c SHA-256: 6d7be5400af3c49ba8251d944081a1f3b660f51e461c56513c9959e7da751929
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The heuristics indicate the document functions as a link farm, pointing to numerous URLs hosted on potentially compromised or disposable domains. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the structure and URL patterns suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://kiuruvedenlukio.fi/tiedostot/file/nukepuvilepopaxezigevewu.pdf
    • http://magicdiscoradio.hu/userfiles/file/gozibo.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607babb9b8bc8---mapikupututovozax.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/fd9ee48ee5ad33642efb8746a36cdf68/pabotufekixevaworexirokas.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609edc4e9f037---xarebapilufitulo.pdf
    • https://evergreencans.com/userfiles/file/daropawuwapopobezip.pdf
    • http://cc-loges.com/uploads/file/lugadanejivexaregokanix.pdf
    • https://anandamsanyal.com/userfiles/file/31150297521.pdf
    • http://93564497.com/userfiles/wifijid.pdf
    • https://stmarys-perthamboy.com/upload/File/56736659647.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/9dbc0d1317487c4577bfb599537c4a4b/93167327301.pdf
    • http://utuin.net/files/fckeditor/file/34749356501.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/69fd30e468a4d797699163d149d6a8f4/9704949264.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c13f8b0183d---gusekaluvenal.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd54397b87c---25996091469.pdf
    • http://clubselectionvoyages.com/images/file/91417528390.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/a504vhcelvoi4f11eq5kcavpft/latefalo.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607247f545c49---9908052467.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a63f44e0df6---50693111082.pdf
    • http://morard-mcf.fr/data/Files/jovaxudikafasidowe.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087abddbf732---36838877712.pdf
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/cdbc22a48d60790064aff2947abe1c7e/kanovupolaxuzerixuli.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=made+to+heaven
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ac.bin
171ab9345bfab9f8dc55454a543f26ed5e04e21e404665a347fb662e65f99717
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AC 27116 bytes
font_01_sfnt_off000124cd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x124CD 16792 bytes
font_02_sfnt_off00013ce3.bin
2dea72e95c5bb112be3892beacb0249b1e064e2d7fea1478617d31cee5a4909d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CE3 9996 bytes
font_03_sfnt_off000152f9.bin
ce979cdfa6edb8a7c6a7d0320f8f172a46b91959418002db679400c35bf8beb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x152F9 4908 bytes