Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ef5e6f7099304b…

MALICIOUS

PDF

54.4 KB Created: 2021-05-04 04:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 432bced60c563bf7ff79d63e7cadee0c SHA-1: fb72d678dc4e2546729fe5a497da2f9efdd10d65 SHA-256: d6ef5e6f7099304b736d824b4ecb5bf8b19b25cb7bb4307f8f9b5e4954a9e394
94 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or redirect users to phishing pages. The ML classifier strongly indicated maliciousness, and the presence of numerous links on disposable hosting further supports this assessment. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9647

Heuristics 4

  • 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 https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/051a066c4c3e3a96a6258cb435399ecc/winafixa.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f87287eb41---20230947105.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/892k61pciojbmrsffqrq1041qj/sulipefopiwobuvo.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/a8723994fdf8c9d75eefad2883d9574a/vigivizeronosexuwosid.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/zagajadilamerededem.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/a2262d074238b14cfd318cde31911426/rujabisexas.pdf
    • http://mousike.it/img_ins/files/betojugipufefepemejaf.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/2962886499d0c52dda87f06f87f46c8c/kekix.pdf
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/db25967a34f443f412c601deff10c9b1/67466825146.pdf
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/7eaae68e7035d723964d1872b1c50b5f/zukoxabosum.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f392a6c843---dewiza.pdf
    • http://zabradli-znerezu.cz/userfiles/file/15357505018.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084c4e59be0b---wutujireredudazarilozene.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea3ad9c4cd---93184083836.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/6b8cbe28a2c8de07dd433e2d109d8e24/95795868478.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=inductive+reasoning+worksheet+2.+1
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c867.bin
8c880e7d65efe1bec57d7d45704dd22506b506a8c3634dfef7361bc5377ea456		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC867 5536 bytes

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