Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a91d36783a253c…

MALICIOUS

PDF

111.8 KB Created: 2021-05-10 10:17:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f04e8e0420be04d969f022049376008 SHA-1: 0bfb5651a52eac0428f06937533e569615a58df0 SHA-256: 50a91d36783a253c03b5cc8d46d09c042ca740cb7e0a4f97325145f6b32a573a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'Claude gift guide fire emblem' and 'wkhtmltopdf', indicating a potential lure for users interested in specific topics, likely leading to phishing or malware downloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7618

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 http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/bo2bvi35aqcfnm28e2o7chqkvv/wuvoforikumupejevoguza.pdf
    • https://zlatartopalovic.rs//files/19166738251.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8620256da1076d52d54418883b8d6ebb/24455045313.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608947399384b---90376839911.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/e5adcf8a298cdea7437824fd6aeca1fa/zukunapejimeforinikotopi.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160918a50257fe---12541600984.pdf
    • http://fullcolorspandoeken.nl/userfiles/file/zegopamelebexol.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/jecela883v7rg4dacm9ddt9oqi/33602607520.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160887255a3ce1---munilaxewutabibofapilu.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084a5525f620---72630477258.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e72b818854---dimiturozubosukixivi.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/c7hph6gi5dftoov78cu34cc5h5/katakatej.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/bac2b77ec3df5b379e600d709291ee38/91629737584.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/38d8t0g4ugg2o2tfbotapc6267/71603610375.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607577a1b1b9e---33070715873.pdf
    • http://zpb-maciejewski.pl/upload/fck/file/widumerozutorolopaxewiw.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ddec28813---50585290573.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/c19f587b24269f9dec061ef9aa1f8936/morawirabakagukivemobed.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/8c0f35866011af8da94a19d2f0d8829c/wolakeroperibuma.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=claude+gift+guide+fire+emblem
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000181a9.bin
864a7664e7a033f052cb5cf8aff7f0528a140dbb24cc3591924fb85eb6e68f37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x181A9 5092 bytes
font_01_sfnt_off000192e5.bin
a57b32e07a3a703bef27397351f73617068c734a6559f8bdab78d0f490cd4328		 pdf-font-stream PDF embedded font (sfnt) at offset 0x192E5 11424 bytes

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