Malicious PDF — malware analysis report

Static analysis result for SHA-256 860a5dc2ec00501b…

MALICIOUS

PDF

62.7 KB Created: 2021-05-09 03:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c41a8cc7641490d4d91390c92cb961e2 SHA-1: 12c9b790d76b8bc9740b7f4f9bb828eb94ef7108 SHA-256: 860a5dc2ec00501b3ac90ec08af8d81d0c88519e291f5b8123e565629ba53c26
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 external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to potentially harmful content, likely for credential harvesting or malware delivery.

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 https://oniceh.ru/uplcv?utm_term=xiaomi+mi+cc+9+android+one
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a14ecc06db---vunaditujitosowugetota.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf63a44c70---viwizuwumururulujevute.pdf
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/of4rtbdbektu8npl64arr1f9p0/42139768068.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/i6kk3tmtpe9819etq6vlhgmvc8/35121241764.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/6bd04fd114e0ee8ea0af649a19c10ae8/76510227665.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/0c7ecb9e1b47695a87e74110482316c7/58009916580.pdf
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/q9eadpc7r58t9onop9im6mefdu/katinogowixaxu.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/926464af6086cb56c6b6cd5529aff6cd/genenekenulupalatagunud.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607379593c80e---8871780354.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/a82a8daae5455b3c24ada546e57b8817/3994007794.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/vnkbj280bj114b2gsrbrlsu803/puxagu.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5ebd948d3---60109382833.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608806c201ce7---buwovebe.pdf
    • http://berallebags.com/UploadFiles/FCKeditor/20210507075536.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160815de122e53---32655681648.pdf
    • https://aravlicraft.com/cmsCart//upload/file/fegekikarojajolesurugog.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16096619d20e2e---924273372.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d585.bin
d834ba4e74fb30eafd442040156d181f0111c06a9440e361501f8e66726fd5a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD585 5008 bytes

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