Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f14e069fb1a922d…

MALICIOUS

PDF

73.6 KB Created: 2021-05-17 01:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8660f9ecbab81e4df786508a2604ac5 SHA-1: 0b847afbca31024187ceccf1054d5eaf767fce68 SHA-256: 5f14e069fb1a922df522ebdd56a724fa2be38c0607b2a86754c91fb4978ed703
182 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple links pointing to potentially compromised WordPress sites and raw IP addresses, indicating a malicious intent to redirect users. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan. The embedded JavaScript likely facilitates the redirection or download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9269

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b43d44c648---pojonujesize.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/9ecf7ff7ad53abf65d68c619a8cb88f6/90024758301.pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/e53a5f6b01575552bf9a2710af59576a/mapopajipirudafikol.pdf
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210508080853463451xlpyav.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608184e629dae---lujizajesigerok.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6d325e64f---74391538299.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16077a2fcd5dda---lutaxedidumigonudimelu.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/b8vqqsdh87c36lgm57n7dsir43/muwizi.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16085e8b265987---verizem.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16084b965822c0---losutogewat.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/r54a6qcfnitf7h1hrj5hso8le0/masakajiluladi.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f925e47c17---sanosegutexi.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16071b61c13315---lapodosazotadu.pdf
    • http://angelcabrera.com/FCKfiles/file/borivipatidisoraxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=android+emulator+for+iphone+2018
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e688.bin
7d1b2b5247dcac077d6c503bc58a9f7eee5b9aab5de5035963e887474bde3e88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE688 5612 bytes
font_01_sfnt_off0000f971.bin
b57f53c110a6af6647ed8b6783812de649cdc515eccc74b633a0a780981d5a98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF971 4440 bytes
font_02_sfnt_off0001055a.bin
6742fdb096b1f2bf92de8610dd9ce24a4ac6edb8bee0c0a75900d7033861f2f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1055A 11004 bytes

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