Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f46f227df79ab0d…

MALICIOUS

PDF

70.7 KB Created: 2021-09-02 14:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 72ea2efbb9816e015aec86d701f05c52 SHA-1: 66861bc0f84476019d9a182f3f486f1ecc4334c2 SHA-256: 0f46f227df79ab0d92e4f504d11a8202e18f2aab4cbb6fdf4615b099cdc419b9
154 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a PDF link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's used to redirect users to malicious sites. The presence of numerous unknown URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5194

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://hani-bee.com/userfiles/files/xuzudawowaranod.pdf In PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/6ff5eed1653a1da495adfa6d953f84fe/xomenipeg.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/8f4ea661abb4df365949e8946d5277db/33062720372.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/1caaf1ac9a1778dd0a3904dcbb6d70e6/ritud.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/fifemi.pdfIn PDF document text
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/81299218736.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/fajutafugavepapumerev.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/delupamexuwis.pdfIn PDF document text
    • https://suadienlanhhanoi.net/upload/files/51748946140.pdfIn PDF document text
    • https://altbuket.ru/files/lunuvujen.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911164c61cf---topewuponatapuluxe.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/kipuwes.pdfIn PDF document text
    • http://seychelles-resort.com/images/blog/file/vufogolerozejiro.pdfIn PDF document text
    • http://princeverma.in/uploads/files/61715607351.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/66727fd1549994c1178e28fb3e62bc9a/55471168990.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/161138254d7d7d---2410502471.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/39322320672.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818eace92ce---vileriwuvad.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/fuvaxupog.pdfIn PDF document text
    • http://373113.linker.tw/files/lijodoxi.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/mijet0d2v5svgehqlthf8u9cm6/regipujinateximopof.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/94085792404.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/58697507624.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=add+two+pdf+in+onePDF link annotation
    • 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_off0000d5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B0 17368 bytes
SHA-256: 4a0a52253ffe2f0fce9f7253e9214c76e9790f81790b13875982f30b71f27059
font_01_sfnt_off000102a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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