Malicious PDF — malware analysis report

Static analysis result for SHA-256 47eb1b2f46157656…

MALICIOUS

PDF

63.6 KB Created: 2021-05-07 05:18:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0a23c3b82feb8fb6a935f2bd0ae67e9 SHA-1: b30e86df7790b555aa7342b86a78decc7ed3dd4f SHA-256: 47eb1b2f4615765623628ab9935ce7e15806501a3987338d1b94660b68c455c2
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/a11c1a26f7e1a6ec626402abf2313fe1/tupufuv.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160808136e71a8---59858294232.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/a3ef5374b5e0fd2d9cf842f903260328/58357711970.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d18ed18e3---wajelef.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/b72329a2cbf3361adcfde1f6b6aa5237/45659112678.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608719137f298---vakefisum.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8f415377f---64450861739.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607551281f088---28847990375.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/pekuwamaf.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070c854b5bc0---87416950788.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092264a0743f---29771347615.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075496e52725---95410613828.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706412b3e7c---20659140561.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/15955fe9c7d9ca4ef5092be6c5d7476a/gikuwomipanakigefikofiga.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/50e957d2f141a0025024139cdc878eeb/limapelajebudoresozelikol.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/2ba596499bdb3db10363f856a24c4b6f/lujopasegizigiv.pdf
    • https://abe-rdc.com/userfiles/file/rikiwodetanelum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=sda+28+fundamental+beliefs+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae1.bin
3d41bdd332f6721631c741ad98fefb54153274f891d7cccef1ec8c0a09bb8179		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE1 5660 bytes

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