PDF malware analysis — malicious · 8c608ab4e9b7af26

MALICIOUS

PDF

80.0 KB Created: 2021-09-19 20:18:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 365b4ca806b3106849f419afea39a094 SHA-1: edbba4096e7253ff2a3f673ae983d215bde2a3fa SHA-256: 8c608ab4e9b7af26218fd41b05ca885c9232f3e446ca6c8b3caf3ce6b28b9e02

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that point to compromised CMS uploads and disposable hosting, suggesting it functions as a link farm. The presence of external URIs and link farms indicates an attempt to redirect users to potentially malicious sites, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.5155

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://huntic.ru/uplcv?utm_term=the+hobbit+storyline PDF link annotation
- http://artbaget.net/admin/ckfinder/userfiles/files/73716498265.pdfIn PDF document text
- http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16140a41b32d48---mogebam.pdfIn PDF document text
- https://losaltos.com/wysiwygfiles/file/1692202180.pdfIn PDF document text
- http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93379741891.pdfIn PDF document text
- http://totoumi.jp/upload/file/javifigidisolaturugi.pdfIn PDF document text
- https://derfo.info/resimler/files/5544986767.pdfIn PDF document text
- http://sweed-trans.eu/ckfinder/userfiles/files/6340091042.pdfIn PDF document text
- https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16138d6105ed32---2297682995.pdfIn PDF document text
- https://forexinc.ca/upload/editor/file/64755097260.pdfIn PDF document text
- https://shreenathtechnologies.com/userfiles/file/75491482733.pdfIn PDF document text
- https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5ef34ff0f---56537063958.pdfIn PDF document text
- http://soojuspilt.ee/files/file/12118396517.pdfIn PDF document text
- http://xiangzhuan.tw/upload/files/sorukidefumogad.pdfIn PDF document text
- https://monyetjoget.com/contents/files/30229900696.pdfIn PDF document text
- https://maintogelonline2.org/contents/files/39154001395.pdfIn PDF document text
- https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/nhosdruened72p53cdronajp5d/54598537371.pdfIn PDF document text
- http://gleb777.com/fck_upload/file/fufelimivutodozuretifa.pdfIn PDF document text
- https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/begipafenuvedekokemoli.pdfIn PDF document text
- https://sssmri.com/ckfinder/userfiles/files/35710311666.pdfIn PDF document text
- https://francoisdaulte.com/ckfinder/userfiles/files/28891290686.pdfIn PDF document text
- http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/33814223572.pdfIn PDF document text
- http://urparitet.ru/admin/ckfinder/userfiles/files/24345758025.pdfIn PDF document text
- https://doanhnghiepvietnam.org/img_duhoc/files/63494774951.pdfIn PDF document text
- https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/c7db7490fb8d3540677c165ef049afe8/10921226410.pdfIn PDF document text
- http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa3b965508---73072084911.pdfIn PDF document text
- 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_off0000e955.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE955	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001016c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1016C	10260 bytes
SHA-256: `b340583870609247ad074eea18ef40297f5962b5d8413befa219081698d33a24`
`font_02_sfnt_off00011870.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11870	17064 bytes
SHA-256: `6878e6f6953aa2e1326ae357b373f81cba0c1fba5c33295568e7545cd781d426`

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