PDF malware analysis — malicious · 06d7cb50cf55744a

MALICIOUS

PDF

76.2 KB Created: 2021-09-16 14:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: ace85e00cf40516fb14ec916f44d48a5 SHA-1: 7d95e002caea234dc9fcf96ffa3975a6409ef761 SHA-256: 06d7cb50cf55744a5e1c31c9aab4c60dc8bb1120e94a7303ef87e0a887956995

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs suggest an attempt to distribute phishing content or further malware payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.8226

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 http://yarpb.ru/pic/userfile/luxizovibuneguras.pdf In PDF document text
- http://novelinternationalschool.com/ckfinder/userfiles/files/jigamubokegebew.pdfIn PDF document text
- https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/9rmh829nlnv5alonp8krkt5puq/33314228090.pdfIn PDF document text
- http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614122e7081cc---63698611285.pdfIn PDF document text
- http://lachambredechos.com/userfiles/file/votetazemunikubevim.pdfIn PDF document text
- http://aotwresort.info/ckfinder/userfiles/files/fadatejiz.pdfIn PDF document text
- https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/246tdvtkdah24nbhpknhkbo56a/vanovejikopegil.pdfIn PDF document text
- http://creationart.hu/files/file/9207777773.pdfIn PDF document text
- http://01host.ru/userfiles/files/xelexadeluvekomawimovase.pdfIn PDF document text
- https://studiecarriere.it/uploads/file/wanarinozizajavuwulazef.pdfIn PDF document text
- http://dulichtantai.com/files/uploaded/files/susugulobolezufun.pdfIn PDF document text
- https://maturana.cl/upload/file/7165343972.pdfIn PDF document text
- http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/sumuti.pdfIn PDF document text
- https://banerjeetourspecial.in/ckfinder/userfiles/files/gogamirabiforisolenuteral.pdfIn PDF document text
- http://pomocnaukowa.net/Upload/file/fisiw.pdfIn PDF document text
- http://alajwakh.com/uploaded_files/userfiles/files/dijemojemosamilib.pdfIn PDF document text
- http://dobermanncz.eu/files/vixizesikejije.pdfIn PDF document text
- http://resortcrimea.com/ckfinder/userfiles/files/leserazibasepamejikixonov.pdfIn PDF document text
- http://box8websites.com/ckfinder/userfiles/files/53392727384.pdfIn PDF document text
- http://archinfo.ru/uploads/file/801382372.pdfIn PDF document text
- https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/12198094657.pdfIn PDF document text
- http://automozg.by/upload/editor/files/lodasigebotisur.pdfIn PDF document text
- http://evergladesharvesting.com/ckfinder/userfiles/files/xujikotepurizuvajelas.pdfIn PDF document text
- http://otelm4b.ru/admin/ckfinder/userfiles/files/33249980572.pdfIn PDF document text
- http://everest-c.ru/ckfinder/userfiles/files/80956289897.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=clip+dj+mp3PDF 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_off0000d0ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD0EA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e901.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE901	10004 bytes
SHA-256: `d6370f1778533ad0a4d397842ccaf99cccefe8f09f8ad1af81288173f30d4816`
`font_02_sfnt_off0000ff10.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF10	19628 bytes
SHA-256: `c89ba151a64b85cba737b6f0d8116435672905168de9b53aedf2abbb69343476`

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