Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c405b7e7469b60b…

MALICIOUS

PDF

88.7 KB Created: 2021-09-07 11:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: dfc43dce95c2cc4160576f846e1fd419 SHA-1: dc90814d23d01732910e5c463cbf8cb8db74cac7 SHA-256: 1c405b7e7469b60b392e1c4151d4edb6e2c24dd965a6b29b04446454772735ba
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and disposable hosting. These links are likely intended to lead users to malicious websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3031

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://allytemp.ru/uplcv?utm_term=ayyappa+pooja+vidhanam+in+english+pdf PDF link annotation
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c02c82c4c96---72425331697.pdfIn PDF document text
    • http://mankatomnclassof71.com/clients/e/e0/e0e8961458839910853a12af65841b27/File/nefepi.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/cf9bec9b2bdebaac71b0d1e10df68a98/vawaboxoragarixedonudo.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/90508100609.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/e78f9314ad5b09f3da344ceacc5c99c6/14499846341.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/1630910811gudiritorufuvadasusiro.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fd930dcb4---95801548763.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/tofitimujepuzidunimifa.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/lukafasi.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///33167266354.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160820adb270e8---1902559372.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/1a1de6906dd8a04338467e66b0efe295/nizimemajalom.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/647113814656cf72a36e974f320a266d/rojobijelasunenipij.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/relevomuvelewazovix.pdfIn PDF document text
    • http://zussobrance.sk/grafika/dokumenty/2001659058.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202107/file/bebakatoladanijarebe.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/8eeb9f64c61472ef4d6a2a2c35975af3/25011516580.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/xofikomubidujeziriga.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608a21bb22afb---livokezozilonoziwevagem.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/f2d3aa8f3121907c4c1502424fb4740b/22763605003.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/darakad.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160812033a4ec8---fosigoj.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/74721531970.pdfIn PDF document text
    • https://abeess.com/userfiles/file/rebelofonef.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001149d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149D 11036 bytes
SHA-256: 67025950f5a6eb8627bbeda2045135e74a2e7a734c8163987ea37158644b303f
font_01_sfnt_off00012dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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