Malicious PDF — malware analysis report

Static analysis result for SHA-256 482e2efa2a13ad22…

MALICIOUS

PDF

84.1 KB Created: 2021-04-28 20:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd1808cfa5438b8b65007a1dd2df4267 SHA-1: 99c512d915f21b9da443113d008f1a2e398ff323 SHA-256: 482e2efa2a13ad22af4efcb8b3e4607e2650f85000a06cf13a5f9b0c6ffb8e06
66 Risk Score

Malware Insights

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

The PDF contains numerous links, with a high-confidence heuristic identifying a link farm pointing to compromised CMS upload storage. The ML classifier strongly indicates maliciousness. Although no scripts were extracted, the presence of multiple links to potentially malicious domains suggests the document is designed to redirect users to sites that may host further malicious content or phishing forms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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 https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/gojk0tha5ibie11ppfpm38ou9p/83025376170.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc60c1e884---vodaliwib.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/ef1d4c548e1acf78a16289ca3a9c24df/44655407316.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/cce25dca1a20c7b2e0c97e0c0cf1db8e/jegisufenefixugelowefuba.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/062f6b3fe00a8b9c9da408b9dd863dd7/fabajirutupavezamep.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d43503d3b1---latafiredobosobe.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee3f506a78---tolawufim.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/n0nb9l7nmqffck38rj99aau9a5/40565944489.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/2572bd409e5230a32a7c52352c6655e1/nufaxod.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0789adf68---54869176562.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16074f8a1bf6ea---rakilazejuzipin.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160898cb03dbe5---51672711760.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/212c9e2ea8d26a8cb83bd9ce8ec53615/wiwake.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e8c941fb947c2f8d5a15c412c9d67c80/67354892674.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a783456759---zekugepiviwigoxepikimaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=alchemy+gold+guide+classic
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c02.bin
b8038ccc93727f94e6de57b9f61000be3da5c7a6fb2e6d567c8ff66bc8a4bbb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C02 5348 bytes
font_01_sfnt_off00011e12.bin
475568bc0f057eefac9d1850c2679a9da76bd5f69cc3ff9b1737ec1f1f4b3864		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E12 11000 bytes

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