Malicious PDF — malware analysis report

Static analysis result for SHA-256 229820804740a8c6…

MALICIOUS

PDF

72.4 KB Created: 2021-09-12 09:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 64948bfbdf1082b6c937c95ca2d8417d SHA-1: 9fc714dd0beba2034c305f43a5fd4de6852da0bf SHA-256: 229820804740a8c601d7a1fe2af0a05097df007ac6780c6d8f06e9bc0734cf80
174 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of an IP address literal in a URI further supports this. The document body is unreadable binary data, typical of obfuscated or malformed PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6632

Heuristics 6

  • 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.
  • 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://burragebrothers.com/demo/jolie/beta/userfiles/files/62477901766.pdf In PDF document text
    • http://185.33.116.145/~acus01/upload/files/18217379541.pdfPDF link annotation
    • http://sjhrz.com/images/upload/File/3508338185.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/fcc548277890b7edc018ea68a0f873e5/15406823176.pdfIn PDF document text
    • http://yksskj.com/ckfinder/userfiles/files/46231592935.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/a2cab5d9b86b7b291a75b3c90e54dd96/49622524118.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/mizumesulofivonupuven.pdfIn PDF document text
    • https://e-room.co/userfiles/file/bozedudisiguwol.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/rozamoxoxogesaxanuxowi.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613422a75bf24---rakemakolujologa.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/zasegapetokope.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac7b2ebbb6---45213148151.pdfIn PDF document text
    • http://hhoasis.org/app/webroot/img/fck/file/45940835217.pdfIn PDF document text
    • http://bagodilovaspark.hu/userfiles/file/47834596935.pdfIn PDF document text
    • http://meubelenindex.nl/images/uploads/29404450984.pdfIn PDF document text
    • https://ctapigroup3.com/contents/files/95326918873.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/juwolinopogaraveludaj.pdfIn PDF document text
    • http://lynxauto.ru/userfiles/file/gareteje.pdfIn PDF document text
    • http://bftt.marketsearching.com/upload/files/2864085701.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/ramozatakibabefi.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/46887451042.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/79727619714.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/22255416460.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210903232000.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/36914461494.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+long+is+do+androids+dream+of+electric+sheepPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF4 11144 bytes
SHA-256: 3bf5c4a99e7b2f1bfa82adfaa62d75a44add65653df747ea25c0eba2a245142b

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