Malicious PDF — malware analysis report

Static analysis result for SHA-256 912eed2c5faca46f…

MALICIOUS

PDF

62.3 KB Created: 2021-06-18 23:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e7cb0dae6340c19a1287a238c89c2775 SHA-1: 9d5b06daa8dcb32fe354a1c3d72ccdd4644ea05d SHA-256: 912eed2c5faca46f14bbcd5eaa6ba0a9b7f69b743352722f67357364d35f2616
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, and contains numerous links to external websites, many hosted on compromised CMS platforms. The document body, though heavily obfuscated, suggests a lure related to 'treasure trove volume 2 short stories workbook answers', likely intended to trick users into visiting these malicious URLs. No scripts were extracted, but the presence of multiple external links and the 'link farm' heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6755

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://chcial.ru/uplcv?utm_term=treasure+trove+volume+2+short+stories+workbook+answers PDF link annotation
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/433f4cb4c7f316699f86f3d0bdce724c/69549374877.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/7395685f5e3056a08807484e7262d3e8/31030838704.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/3ik2st12cj4g2jqt2ssohs4870/dusajunagoxopebefibugik.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac08a659c---tutajetavemapusakibezijo.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0e2a4f19e---96101711715.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9659f0b14---43821950292.pdfIn PDF document text
    • http://hanarotalk.com/userfiles/file/%5C/32284216337.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/4ab0d8454470bbb71567dfd3c5dcc055/94179733683.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/duap4d736ms6ejsr96ghlt1i6e/25304149407.pdfIn PDF document text
    • http://standdominica.org/files/files/ferata.pdfIn PDF document text
    • https://sgcaregiver.org/contents/files/magikudevokawiriti.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c29615ba5638939f1651ed7a31cac787/damolemuvomujomebapo.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/gjfedv7d0mch58cgku0s57rcgf/86355534516.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/3501968520.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/6d4b975a4a0e70d0d959777c693df8d1/81121811852.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be085db8d44---70838054312.pdfIn PDF document text

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