PDF malware analysis — malicious · b831297df664941b

MALICIOUS

PDF

67.9 KB Created: 2021-09-08 02:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: b5006af5f5e01dae678ddbd3fa2eb74a SHA-1: d65122620e5c91d318bca4e25b0249d7c019fe6b SHA-256: b831297df664941b5f78ae5bae452e623f04de5548adf3e60de7c24f5018837a

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories and disposable domains. These links are likely intended to lure users into clicking them, potentially leading to phishing pages or malware downloads. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.5423

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://tdbakademi.org/userfiles/files/41763430271.pdf In PDF document text
- http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608d96af10f96---turikejiziremanafagako.pdfIn PDF document text
- http://whatdwellswithin.com/file/befazuxerunurofeduvota.pdfIn PDF document text
- https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/6hknnsf2fmm9l4qvombr0o4j26/29729776669.pdfIn PDF document text
- http://mytaylormadefamilyusa.com/clients/864113/File/2159868311.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f58027f7e2---kexefage.pdfIn PDF document text
- http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a37a80e0c3e---48919718615.pdfIn PDF document text
- https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/8a3516dab68afcc9dd39a703c12c30c0/567082645.pdfIn PDF document text
- http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071298656940---95770701590.pdfIn PDF document text
- http://banglatalkies.com/dynamic-images/cms/file/11187922295.pdfIn PDF document text
- http://boissee.fr/userfiles/file/37948714039.pdfIn PDF document text
- http://dsagco.com/Upload/file/vajixapis.pdfIn PDF document text
- http://homeopathyhongkong.cn/files/17755483921.pdfIn PDF document text
- https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/tmp0kl4innrghlif6g2n5lt8mh/77806006265.pdfIn PDF document text
- http://ebslang.net/_UploadFile/Images/file/jikono.pdfIn PDF document text
- https://vydavatelstvoklett.sk/userfiles/file/bunutubekiwudojizidima.pdfIn PDF document text
- http://huijingweb.com/upload_fck/file/2021-8-16/20210816225300781664.pdfIn PDF document text
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/b293c635937235f2cf36bdce6ea1adc1/90461025063.pdfIn PDF document text
- http://xn--om2b25zm6igqb.com/ckupload/files/bunibemonabodox.pdfIn PDF document text
- https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/601a0afc9083143c34c545afdb8e1af3/4024206532.pdfIn PDF document text
- https://www.vita-organic.eu/admin/ckfinder/userfiles/files/bitunezenekutiwewotemeni.pdfIn PDF document text
- http://guanzhuli.com/userfiles/file/powigoforaji.pdfIn PDF document text
- http://sarljarry.fr/userfiles/file/ruruvitifupebin.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=maths+gcse+indices+worksheetsPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b863.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB863	16728 bytes
SHA-256: `fc476600aae965c13e5f07638002ea08dc507b12fc1d6c0558c01c721c11c73a`
`font_01_sfnt_off0000e359.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE359	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000fb70.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB70	10772 bytes
SHA-256: `2e71e901af96d5975d068e0d499432db40c850a572a3119b9d5e3608151c847a`

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