Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f67039aa56d7994…

MALICIOUS

PDF

83.4 KB Created: 2021-05-06 23:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24ea8fd3656f06c6733cb5729b98ac97 SHA-1: 2d23c6f1d84e817e62e46cbb608d79216756480c SHA-256: 8f67039aa56d79949791759094431f489bd8ea7cdc7c436906f69a062983735a
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 high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other potentially malicious domains. The primary purpose appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9450

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 https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/3e8aff7d9466879a67767fe4673a2885/93734781560.pdf
    • https://alnahamgroup.com/userfiles/file/vogenugobufipuwanilovoji.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/1m13em7c2quiac3afb70hqo2s6/47486857864.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/01ee3279639a4ca44188d7a4b7812b86/vozamedobugiwijomofawezel.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7cc679eb5---20887686796.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607cff9b09896---70432925341.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3c65afd8f---87930532910.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077af4f57e5f---lojozenekip.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/3d19ab7a99ebd050e892cb230a795277/jofexa.pdf
    • http://aliceinformaticasrl.com/user/pages/doliberunizosudegemolefo.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713edc45e4b---rarokeditop.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160748fc5b1e2d---barewofun.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609405bb3f979---65580815807.pdf
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086f1e016c94---244957810.pdf
    • https://zanhotel.ro/beficientconsultingFiles/file/31421230995.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/66bgpnus59ifcqppi118ec7c6g/nozewez.pdf
    • https://paklya.su/design/img/upload/file/11181839148.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc66cac657---gununoxijiribodep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=gitlab+markdown+preformatted
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dcd.bin
de47db92bf3f5fc51c91a90cec9a4790fad33f2756616adfc92d32a4e0b11531		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCD 3136 bytes
font_01_sfnt_off00011914.bin
ec6926411dc762418630f04e0d78d55f6076f78c451995e3ce0afb1d4acb6058		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11914 5336 bytes
font_02_sfnt_off00012b38.bin
9539e2f0a1bf5a0ab72171ac34b0f100169dca630828aea5b95bc0edb3c6efdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B38 11952 bytes

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