Malicious PDF — malware analysis report

Static analysis result for SHA-256 034eb662f61aba0a…

MALICIOUS

PDF

63.7 KB Created: 2021-05-27 12:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d68cf64ca21698083a407f6344f0b384 SHA-1: 3b8c13e75df13dc4300f4c368291c193bdf9090a SHA-256: 034eb662f61aba0af331cb661ac9b97fd519bed5574bb67a29dd70506818b44d
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://meble-tk.pl/userfiles/file/29555995068.pdf
    • http://cezanart.com/userfiles/file/pagivinidepapotakenopimi.pdf
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/32cc41c1c9c8f884ac7fca0daef574c2/25914174356.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a78d1b6024d---naxokokifipel.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/63a9e590a5e61834d7065514fd5eaf11/96944650074.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4c91a4ea7---31856069029.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f521674588---92802041036.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d1c9d1a7b---25313274638.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607eac0767f75---57098122868.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/4cdf162a90c43ee7b979434d8b2f0183/37391550622.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f26ba40abd---69471792509.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878137a96d8---44278470014.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160873e1c3ab6e---vuxezajibutifidibifena.pdf
    • http://mynigaoe.com/upload/file/20210525070836.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/4novhr5a4l0ricrjm3f0jc2cn7/vabamukijevixugedoba.pdf
    • http://curry-box-deluxe.de/userfiles/file/ropopedopuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=carquest+oil+filter+lookup
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d52b.bin
a728ce3ab8ffefc2abf0049bc7a8ad6857b78c809460830302d0051c8d093098		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD52B 4988 bytes

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