Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22c849c00f312ce…

MALICIOUS

PDF

66.3 KB Created: 2021-05-17 22:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a995a6f2ef4a7c4a7c0ffd34cccc053 SHA-1: ce3abb377d3f8e94ac777587db1b35b6953ffb92 SHA-256: e22c849c00f312cee7e66cc08d05c1032294c19830e9d45088d2aa33ca12772d
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9059

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://jnnycc.org/userfiles/file/kunipemubo.pdf
    • http://arohitourandtravels.com/userfiles/file/mezonetapiz.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fed39ac05---2852081188.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1e6d853f1---rifowosepe.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072c4b37d857---fefodepa.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16092045f215d0---mapefitewipogokepafogal.pdf
    • http://www.deopendeur.org/imgUser/file/defelagizebi.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094cbe287625---zuvevivegoremumofaxabafex.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-8/20210508231919687753.pdf
    • http://banglatalkies.com/dynamic-images/cms/file/94186090051.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607984822eea1---zopatawerugonigesaz.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/2284df2e4cc87cb404026e2983e462d8/riwugitajinakixejuwinufa.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c98ad8d860---paxusegovivodorogituwixe.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/b105a50bda3604c97e639599cd40834a/mitekareluf.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738aca13271---34980389530.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=car+service+checklist+template+uk
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbde.bin
1fb8cc80d4da779cceab0a5d356e25b9d17af97393502ba4b1c42b997b85e450		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDE 5200 bytes
font_01_sfnt_off0000ed6a.bin
c30ed46bd847023bdcef93f7e2d7ba3802862de9fae314aaf4cd8763251317f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED6A 9988 bytes

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