Malicious PDF — malware analysis report

Static analysis result for SHA-256 58fec5906b513855…

MALICIOUS

PDF

63.7 KB Created: 2021-06-24 18:38:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 220c215670cd408b4931251135949a0c SHA-1: b81116fff5464ca8ac1932fb91fc55ab44241628 SHA-256: 58fec5906b513855a22fdd81ec24260c7fa65472c86f690a4ff5e8cefa86f7c4
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, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised websites, likely to obscure the true destination and evade detection. The document body, though heavily obfuscated, suggests a lure related to downloading an application, such as 'bb racing 2 download apk'. No scripts were extracted, but the presence of multiple external URIs and the overall structure strongly suggest a phishing attempt to deliver a malicious payload.

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 http://ekolojikweb.net/upld/userfiles/file/19017846166.pdf In PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/vuremerisulelixikenupoz.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/dejjls2bi6vfp4b6cqg9egc6m6/7037446631.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607defa8d69cf---kevotoxuwaxilijabapib.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/gapeduroxagomeneb.pdfIn PDF document text
    • http://soupworld.de/upload/file/tuzitakuvu.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c51323f1edd---wepalunonosupovis.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6470dded3---46196492538.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077094bdf50a---gewijelesuvupopaxonuzila.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/josidapovefimubuma.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16077f682ea0b6---73414946794.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099cca06a607---vugefoje.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a465dfa1729---2397354535.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/xozuvilij.pdfIn PDF document text
    • http://memphiscentral1969.com/clients/865565/File/dosiwixovin.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/nijesaxof.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/csse2kd2itdeekgp59pdhho4u7/nonez.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/GLLx1DTH0VQ/uplcv?utm_term=bb+racing+2+download+apkPDF 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_off0000d9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F6 5540 bytes
SHA-256: a2a413f4df7584046b6ca76dd31832ae75eb6ac3160ad0e5e9f52b35c858ffd3

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