Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0f142e455adfb4…

MALICIOUS

PDF

96.0 KB Created: 2021-05-06 13:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 091973822cc4f624696e6ee6d6eb5f6d SHA-1: b23a524fee2222ec8cf3df9c4c25a678dcf05076 SHA-256: ee0f142e455adfb4e70d677ed1a50c92696cb6334bf80cf14077f1f78be6dc10
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as a phishing trojan by ClamAV. Static analysis revealed it contains a link farm with numerous URLs pointing to compromised WordPress sites, likely serving as a lure for malicious content or phishing. No scripts were extracted, and the document body was unreadable, but the presence of multiple compromised domains strongly suggests a malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4405

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 https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/popcpga9d0563bnfk2m9j4b2n1/80279087689.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caf8408c69---96841177060.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/8460ea1ce33ec7a74caf72856f1680b2/33850027407.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608500566dd14---muzoxexarizijizupubawun.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091715d4984a---22572545192.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/13766bca4df8ab18e50b934c9c689852/60299472263.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908d3c858ad---salomijijolikawadobi.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e196460baf---lopuvugeweguxuragik.pdf
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/gdr80fbcev5ll6rpg02o6vk65j/66964144779.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160936a95e3b4c---85101021615.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16071ba40480a9---72870389957.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089bfa08db5d---48939694374.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdb7e7831c---93048438971.pdf
    • https://festival.bg/fckeditorfiles/file/38646709756.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3b3251114---vitanojubikigenubosotawi.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/9b7161bea05f6268fd71eaa33237a80d/78218297858.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.thdl.org/http://www.thdl.org/Tibetan
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=shooting+star+emoji+android
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/copyleft/gpl.htmlTibetan

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1ce.bin
4e5bfeaf02523f44dc97b2e9c97b7b49be064b66ec97483c65b776c210a3bf13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CE 7600 bytes
font_01_sfnt_off0000f512.bin
c0b2ac107a0c4dc40efcf057cbb9b88218f5a1f4a2611aff69a4b3d1ecef2469		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF512 2916 bytes
font_02_sfnt_off0000ff72.bin
da5f961c558c01a6cac966e2779d7384afd5d8cb3e1277db3515649e927107c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF72 5388 bytes
font_03_sfnt_off00011158.bin
7d3b1e7cf1321644708363e309dc3969d2ee74b36aa29c55abf24ec81df87a33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11158 6576 bytes
font_04_sfnt_off00012155.bin
9a8b4e73aef4233a7762182f2175c7ebbc7ae08aabdc64a684470eda8c583edc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12155 8444 bytes
font_05_sfnt_off00013153.bin
c4b333362161cd596b9eccc24397a556ce3de130be7220c0872bfc6cf7fca522		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13153 7184 bytes
font_06_sfnt_off000147e6.bin
885f67368eb6106c0f1c65a6d12c2a9176b67131a63cb30a04381b2f91dc144c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147E6 11088 bytes

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