Malicious PDF — malware analysis report

Static analysis result for SHA-256 df63bf8d50cdcb7e…

MALICIOUS

PDF

90.1 KB Created: 2021-06-26 09:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fb3fb0126573f653ed9003b01f342058 SHA-1: 4951d4f1a40fb2f99d021deea6133f6520023f5d SHA-256: df63bf8d50cdcb7e06e05bd9e8ae13a7f8df61da0e49c0f77a90a8d599298f4e
64 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to compromised WordPress sites and disposable hosting. This indicates the document is likely used as a link farm to redirect users to potentially malicious content or for SEO poisoning. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.2404

Heuristics 4

  • 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://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606d4cac7627d---tubugotumawigagizen.pdf In PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a083dc5451---77769896510.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/da5qkmnt5o7l164kkgg8kvkf6ol2mm4l/nugozosidogawuxesuro.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///93355355817.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d854479c0---74906859245.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/b4rpvr1ibc105tc6b8cqllc6fv/31154439629.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/c34dea3836c5be57f0b10c90a641742a/17538172189.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/b7208660a70d13477c05dacec30295e1/fowaxo.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b47fc3324---94180141466.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/21k538dmkgpssecj6ulqfmahgd/10139778600.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae65bacd22f---95608666873.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/mibame.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/f100550ee2bdead0c9e9e125342ec23f/76700627205.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/0e201ed4ad3562ee766f34aa09b486e0/53963877670.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/v2gha99vp1nkaumrn3fvd6792u/74873406572.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/d3e16ef7f4416cd8f32dde9ba928b3d2/wosokelilazibamunutopo.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160756fa12720f---lilis.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/lakuritomavixuvenada.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/ba3e969980dbac3ba93b7a68cabf8d44/20485527649.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/bf176246d991b449595cb8a997334d5d/katagivuduzodezokidoki.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/qurl1vkit4o1cl1085qbvg4i4t/zonawowaxasativik.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/ad96379f48b78b6a24504017fa0d4541/83054095322.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/59338100421.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/subitelanomif.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/e6542375cbfee4bac246728d226b0559/koxugosuze.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/7ff6bbf22214a1f24dba070a242e07e9/bekexululerikozubinoga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=current+united+nation+secretary+generalPDF 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_off000127e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E3 10788 bytes
SHA-256: f9b16c1e4ef67e78faa14d79dc860873afc4633609718f90382e5de5e7e90657
font_01_sfnt_off000140b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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