Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6e873203ec9992…

MALICIOUS

PDF

91.1 KB Created: 2021-06-23 22:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 562a2a9a8a1e65f6c4e443393b48e01a SHA-1: 808e6e3f962146c86259be2b137b76cebd94b66a SHA-256: cd6e873203ec999250c32e07f1e1d7dc1a2bf5905c40cb850cafe61115085ceb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of multiple links on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6899

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://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072aedd68004---48272925657.pdf In PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e30b87f0edfdec4ab3b4ce3c56eaccba/dopokakibimejem.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16093099953ce0---vasewenovujek.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/ef09a5894950d1097f856fc02d2ef0eb/24026670290.pdfIn PDF document text
    • http://edwindijk.nl/home/edijk/domains/edwindijk.nl/public_html/uploads/file/14362871767.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/94717362440.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/balopedoxufemapusejep.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078de467705a---mazerujizekavux.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb7b517449---70510213337.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608132c4bb53c---lijugofevosawikepire.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/40914083422.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-9/20210509063000458330.pdfIn PDF document text
    • https://ewt.cz/res/file/84198566043.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/9f461da78d60d60b479e1f0e9e40395e/givawosaramowulunaniro.pdfIn PDF document text
    • http://teraval.cz/res/file/51561493071.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/xujonolakukaxatazigukil.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad51f197a5e---73734909754.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8100781d8---xofemejesujetimakavu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=ambient+findability+pdfPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC5 26436 bytes
SHA-256: ef504fe86f6e2aef6f7c9cec733141c67784f15add791b690dad2adb70de2014
font_01_sfnt_off00013f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F71 5144 bytes
SHA-256: 4abd0193a0232ec653c38b62551bf778c116c102a2e940dc656a8e77f8b676a4

Open this report in the interactive analyzer, or submit your own file for analysis.