Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2df29162ddafd1…

MALICIOUS

PDF

66.7 KB Created: 2021-05-26 02:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42254e5faa5dc35857f6b104068cda54 SHA-1: ccfecd56bc75d9edc3645d4a28a3dfefc4806693 SHA-256: 8e2df29162ddafd120f4a052b86bf527abc0743e8f3fb2c7d33b768cf647d0be
154 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or redirection strategy to host malicious content. The document body, though heavily obfuscated, appears to be a lure for free crochet patterns, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b620a9d51c---12896745096.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/dloai33rv0dpo041aqkpgq10e3/80913371261.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4386ad9576b366039691ec14d7c06907/busumudalurasipidiba.pdf
    • http://www.bandungmesin.com/file/38127093844.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/5t29mcvr35j0e8kd9idh73jod5/rajuzebini.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1780a10bb---wedumewaxapa.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607310d0c6dcf---15691999438.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609387c4bdd65---bizamowazerapos.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608655c7cf7a2---87077118110.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16073989c1ca2d---vamomur.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079e3f458f04---62137201481.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b448eefd2a---88494410269.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef7889d95a---87943584777.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888a4a28caf---gumokeremamozaput.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ac00bd44f---94836074040.pdf
    • http://phuocthuan.vn/images/pic/file/rosokajovad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=free+crochet+doily+patterns+download+free+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d576.bin
6d988e6f5d47c19f09ef8ef9ebc61dabbc02dee3937f5f61e71f322c4c0604ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD576 5392 bytes
font_01_sfnt_off0000e7e3.bin
00c12f5f9e982c7fb8b26954d9651903a5616b911a649cd470b184529842aded		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E3 10892 bytes

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