Malicious PDF — malware analysis report

Static analysis result for SHA-256 c241790abe424614…

MALICIOUS

PDF

63.4 KB Created: 2021-06-11 02:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 474d5be82632259949bd4dc831dff3cd SHA-1: 28c32465007554475c9880d39b68f1a68960f569 SHA-256: c241790abe424614d4958228b0c41aed761214b8dcc1399639596fa79ecf0d29
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 phishing or trojan payload. It contains numerous links to compromised websites, suggesting it is part of a link farm designed to redirect users to malicious content, likely a second-stage download. The document body, though heavily obfuscated, contains keywords related to movie downloads, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8608

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://catamma.ru/uplcv?utm_term=insidious+1+telugu+dubbed+movie+download PDF link annotation
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/63300958294.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d496e2363---fomigefu.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084af74e02f4---nivel.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/52f6e2aab7d50d7065ce38363e1cd64a/97981459868.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607384b25b32d---pidenijev.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/13e8a39b9cca08a93147760dd1bf6947/mosogupexedoni.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4c52ef8d2---18565221999.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/bexodumijapizakomitog.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/wejigusebezojivixi.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/bagugazegerofebaf.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/1c7c49a0d897f72cd5156c76de9984fa/27337542505.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/hssrmeqbpkbh2r7npo2mkl2gh2/91697127534.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/72564fa2d630d7ad2a7b97289fc9e921/20086704055.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/soverojogojoga.pdfIn PDF document text
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/c2235848fffe006d56349ad354a743a5/47219155175.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BB 5332 bytes
SHA-256: 522984cabd020cb2daa54f6b632c5f43fed396d8da024c6846728fb5985d1d2f

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