Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc1a990e90e5f206…

MALICIOUS

PDF

59.2 KB Created: 2021-05-02 04:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d8e1603df037ff561e9a1c7c3f6a3838 SHA-1: 4403fdb51c56f1c9f02e9b7406967620505ace52 SHA-256: fc1a990e90e5f2066acbbca311e3239b1caaba165d1fefc1904899fd121e19bc
154 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to phishing sites or download further malware. The presence of multiple distinct hosts hosting similar PDF files points to a coordinated distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8151

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 https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/0738e67bbdc4801b5e3c26f55266ab32/66367546358.pdf In PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/iu0m7o07g33ludt57qrdnmvcs5/53363219792.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/hu48evr389rkobvhfkv1pvavcg/gasonakep.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/d25668af0d349de5a1d8e16df123f1d9/91795108206.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16074fbc61d442---bowigetisolisaj.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/moeg9gp15t7m0qi5u1bhlrjjh7/tofasugunikavinaxuwerimiz.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833bfb6f58b---71991868765.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607026429c5dc---sakevadaba.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/a6e36998449e10473a274ed03bf78183/21773752217.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e448703839---gamibi.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/3d3f3fdc0c60d47644003c9d9d91c31e/xavob.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/3h3aco70q1m6anudf5q1g70hi5/34696073017.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2848be8dd---41978913924.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16087d1c1011c9---64835865343.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d6c38fcb9bf0d7962d75df84c888a799/gowuje.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/0b212de395d16a24aac5a61096c49670/bizadagejametufilok.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/00l1n3thorjca0jb34ehcm0noi/duwas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=army+biosketch+templatePDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD273 5152 bytes
SHA-256: 58300046dad99f61ea6dc06d01c4b5cc4a154584ad560362fb1b95c14f697be7

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