Malicious PDF — malware analysis report

Static analysis result for SHA-256 0437e9f8e1d4755a…

MALICIOUS

PDF

55.2 KB Created: 2021-05-06 14:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d3e18dc4e9cd60ad35444eaf1373c11 SHA-1: d1c6204b65dcfe604224b2d9362c40e570745660 SHA-256: 0437e9f8e1d4755abf4a4f36d6e72420a46731db184f062e5b6de2db55bb187c
154 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to download further malicious content from compromised WordPress sites and disposable hosting. The document's content, though heavily obfuscated, suggests a lure related to pension applications, likely to trick users into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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 http://aep-tc.com/cache/fck_files/file/siluwepebipamoz.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16081645699722---jabumebuwe.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a39425f69d---80594871363.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a9a35543f---wunatirixanupef.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d184fb010e---28423290676.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/353bea531959b86b472c35f2d69375d9/22981976933.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c94d02920---gewil.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/421d475a92b6fea950bd5ececf0b6f22/13039434962.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160774eb1d58b2---16304075108.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d40ea6abe3---mexesimolenigumovo.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076d06d6c259---718504563.pdf
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/5ufc22regn9u1i05g2ti81i14n/16825442106.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/069dd00248d943d7f8b65a97db08b22c/89278750984.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9edde3739---xiliguminadamizuzenavepi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=old+age+pension+application+form+haryana
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdbb.bin
a824bdc51c246533cbb301b6a7d70063e5ff533f1f79e021fd8e0472a5f57e4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBB 5700 bytes

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