Malicious PDF — malware analysis report

Static analysis result for SHA-256 9588bd54031321b0…

MALICIOUS

PDF

79.6 KB Created: 2021-07-31 16:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 548ca6f4673cf902ca0bb4b7ce8bec9a SHA-1: 3013f127121654ee1aeee13c5f68c47063ece9f5 SHA-256: 9588bd54031321b0c481483dca9db1d2378c000b2c57801a0d891a6af2bd92db
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating it likely exploits PDF vulnerabilities. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded JavaScript, though obfuscated, further supports the potential for malicious execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9362

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 https://allytemp.ru/uplcv?utm_term=how+to+mount+65+inch+tv+on+drywall PDF link annotation
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a5cd4ffd8---65123275812.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8f2033fb0f---sixamevup.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/kumanadutakimudiv.pdfIn PDF document text
    • https://jurad.eu/files/file/kowoxiwedep.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/4810890334.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb7df990c37---sozomek.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/sipakisopeperovipuxuker.pdfIn PDF document text
    • http://deryalvincotokurtarma.com/userfiles/file/78465185599.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/5j4bisht1sfffklh6j2men2tdm/jiwejale.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/perogisopibog.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/b2db60aa508e5075cab36c7ee9f76bb4/21291998719.pdfIn PDF document text
    • https://okinawa4d.com/contents//files/21443688408.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/14516734525.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/68052648220.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/mowumurubameseworapafutex.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/6l4fnq3d16uk9gpgk8gklu1bpf/buwosupoluwi.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799e4e8b077---50977555756.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210614_162521.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/617674087.pdfIn PDF document text
    • http://saydersan.com/firma/files/27236488368.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/d829086dff3bc396570f19d46366b831/riwonas.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/83254726509.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/e791929d4a946f97af4ea71d19e88ca4/pajozixaximalopuku.pdfIn PDF document text
    • 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_off00011f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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