MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is a PDF containing embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites. The heuristics indicate the PDF acts as a link farm, with many URLs pointing to potentially compromised or disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support its malicious nature.
Machine Learning
- Nyx PDF Classifier malicious score 0.9947
Heuristics 7
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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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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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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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 http://baodieptailor.com/uploads/2021-09-10/images/files/91324677953.pdf
- http://jinruily.com/UploadFile/file/20210905112835320.pdf
- https://tomorrowhubs.com/upload/users/files/zibinagipu.pdf
- https://cukimentescukraszda.hu/files/files/wazawesibuzuvigesurema.pdf
- http://twilaw.com/files/files/bigaxap.pdf
- http://podhoru.cz/userfiles/file/ragobexika.pdf
- http://allycatering.com/userfiles/5115681015.pdf
- http://meadescafe.com/userfiles/file/vivikekuvosusefapamuzuv.pdf
- http://www.ocptecnology.com/admin/uploaded/fck/file/1378977194.pdf
- https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/9930762446.pdf
- https://bosgo.mn/uploads/files/limelonokefof.pdf
- https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161426e0f63666---zogowopisivibukumapudo.pdf
- http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/a0cks68djgcg3bl7uqmcon9jq4/33582311919.pdf
- http://maturitni-ples.eu/UserFiles/File/4452724064.pdf
- https://chinese-wall.tw/upload/files/tepalomuwoxas.pdf
- http://ziva-muzika.cz/files/file/81815044068.pdf
- http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130a438800a1---93862961297.pdf
- https://membermimpi.com/contents/files/fepowe.pdf
- http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kazaleginekurufaro.pdf
- http://steinemann-ag.ru/xokezofade.pdf
- https://termokingbt.com/ckfinder/userfiles/files/kijinap.pdf
- http://giustizianuova.it/userfiles/file/51736561498.pdf
- http://oldmotorsclub.com/files/file/12254715928.pdf
- http://speed-r.com/js/upload/files/linimubopimuzipokax.pdf
- http://mfo-fond.ru/ckeditor/ckfinder/userfiles/Images/files/55823205832.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=morning+dirty+jokes
- 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_off0000afc3.bin0ad7dd58acfc444d2e3abc8f4f755eab6aba3bd06367069c2e546d36f5578cce |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xAFC3 | 14596 bytes |
font_01_sfnt_off0000d43c.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD43C | 16792 bytes |
font_02_sfnt_off0000ec53.bind129ed73b91e679d309a81f6f5aa6435730117d6fefc356b1af0bdee12589049 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEC53 | 10544 bytes |
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