MALICIOUS
192
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is a PDF containing embedded JavaScript, flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it functions as a link farm, pointing to compromised WordPress sites, and employs lures related to invoices and callback phishing. The embedded JavaScript likely serves to download and execute a second-stage payload from one of the provided URLs.
Machine Learning
- Nyx PDF Classifier malicious score 0.9951
Heuristics 9
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF 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.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall 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.
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Callback phishing phone lure medium SE_CALLBACK_LUREDocument asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Fake invoice / payment lure low SE_INVOICE_LUREDocument contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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Embedded URL info EMBEDDED_URLOne 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://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc24346a52---suxawiserinoviw.pdf
- http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a216b168161---58778906631.pdf
- http://hnkingdee.cn/Files/file/202163161525.pdf
- https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/008c7fbbbc1f5b8b6cb7a7d2082ee6cf/21466458614.pdf
- https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6ee01676b---vitozu.pdf
- http://futurepoolandspa.com/ckfinder/userfiles/files/bezowenuteba.pdf
- http://proxima-design.cz/files/file/wadajiwazogedokat.pdf
- https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a33a49ee05b---pomevokupu.pdf
- http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8864b63878---rezenoviniteluparawiguj.pdf
- http://boothbayharborshipyard.com/userfiles/file/52993135540.pdf
- https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/6dcb42f60e9e8b1a285bae7e168c0754/66431107545.pdf
- http://nw-line.ru/generic/uploaded/59234233862.pdf
- https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0d4dc9ed8---zawutanarakuta.pdf
- https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/1f1fa5d5f9c8c9ede840d8836cf8e110/fujekoregikekeji.pdf
- https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160783a9062068---42100294501.pdf
- https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/ekdbaiiu1ko86lu8uf99i8nser/5904801751.pdf
- https://werbemittelag.chupload/file/20819982382.pdf
- https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/oto7s7e29iinoa4r0fadd2to5u/17958973474.pdf
- https://my-natural-style.net/upload/files/letiba.pdf
- http://clearspace-design.com/CKEdit/upload/files/zekizuvedapo.pdf
- https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/98e26c7fbba3a09a39cb98b1c60200df/sowimanes.pdf
- https://silatur.com/js/ckfinder/userfiles/files/tuxazefemapujakujadati.pdf
- http://bsbcarpet.com/userfiles/file/19772937021.pdf
- https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/rbmn31o209khe9sapdqjovdamc/vutuzizosajavo.pdf
- https://jewfri.kr/files/image/files/33573472756.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=account+notes+pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000e49e.bin191c1dc7a6c9d1cfd5ee360ba377ba6a026a34e130380b04a22577bf01a4fb97 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE49E | 10292 bytes |
font_01_sfnt_off0000fbfc.bin50bf42f65a5329ae3b1f7ecea5fa159016b21d967e36721d3447b7551ee0f8e8 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFBFC | 17076 bytes |
font_02_sfnt_off000128c3.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x128C3 | 16792 bytes |
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