MALICIOUS
224
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF was flagged as malicious by a machine learning classifier and ClamAV. The document employs social engineering tactics, specifically a 'Browser extension / update installation lure', to trick users into installing potentially harmful software. It also contains numerous links to compromised WordPress upload storage, suggesting it is part of a link farm used to distribute malware or phishing content. No scripts were extracted, but the presence of these lures and compromised links indicates a high likelihood of malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9990
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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Browser extension / update installation lure high SE_BROWSER_INSTALL_LUREDocument tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/fdp2g73gmkr6funen7evcag77e/54622272171.pdf
- http://tilestone-pools.com/i/File/94297177086.pdf
- https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e59970c697---baxij.pdf
- https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c85708c37a0---vuwetanuladakugekodofeb.pdf
- https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/b745247be07949830f10b927374b6946/82461585728.pdf
- http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9167d27377---33360663160.pdf
- https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/29eb066e2048ad5256d0906de05e29e2/96156502924.pdf
- https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/0ef5a09a60c6285504ff185b2bbc01ab/2485602256.pdf
- http://cristal-in.fr/userfiles/file/86486516613.pdf
- http://labotinnghia.com/img/files/26800893295.pdf
- https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/ve6e0vjifaeeus70hn6aap5uq4/kadunigidojudir.pdf
- https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6fbe10aae---vagememotitexob.pdf
- http://28777886.com/Lpf/UPFILE/userfiles/files/43821523479.pdf
- http://kursadowicz.pl/Upload/file/84564241452.pdf
- https://marblobathware.ph/app/webroot/img/files/78145159770.pdf
- https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606f62afe39a0---rotopirop.pdf
- https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16090bc3ebca10---pagekevuf.pdf
- http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/b94a463de48ce881fd5b2faeab3e509f/xajevor.pdf
- http://woorymart.com/userData/board/file/59369890262.pdf
- http://iproperty.ae/userfiles/file/vedekozo.pdf
- http://techscreening.com/userfiles/files/11934145414.pdf
- https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/ceik3h4t5d7o7488nhnci983hh/49902106353.pdf
- http://nemdanangpho.com/uploads/2021-05-28/images/files/vazavaxekisetupenuniku.pdf
- http://grandchainfamilyfoundation.org/clients/85333/File/kerada.pdf
- http://xn--tnqz8hz5cb8l.com/upload/files/93346181872.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+use+attached+in+email
- 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_off0000f7a4.bina4e01a561e9fd6a60dbe1ab46930e1a8c369ff9efc1d5cea1d14cee141a8bd53 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF7A4 | 10712 bytes |
font_01_sfnt_off0001100f.bin1889b711c05dbfa3ffa15e3933365ddd3ad39dac13df97463e76c093224dcc5a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1100F | 17052 bytes |
font_02_sfnt_off00013cbd.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13CBD | 16792 bytes |
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