MALICIOUS
176
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm and a callback phishing lure, directing users to potentially compromised websites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into a fraudulent interaction.
Machine Learning
- Nyx PDF Classifier malicious score 0.9960
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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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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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://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/an37c0mhl40613q3u26b1evska/bividenapo.pdf
- http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/dok7ihdluup07eb916fvdh5gv7/66026645270.pdf
- https://telliogluhukuk.com/userfiles/file/69882510532.pdf
- http://www.niziointerior.pl/upload/file/nurokavawubogotav.pdf
- https://candica.pl/ckfinder/userfiles/files/95189951034.pdf
- https://ochronaskory.pl/pliki_user/File/38150631505.pdf
- https://smartcirclegroup.com/userfiles/file/39350167947.pdf
- https://nhatngudongkinh.com/upload/ckupload/files/32355943333.pdf
- https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/f26fcd512ad390ee44dfc0191ab1d64d/nuzasalek.pdf
- http://innova-perila.ru/upload/files/fufilarazojix.pdf
- https://vegan-eshop.cz/data/file/pijavipovosimig.pdf
- http://vijyaiprismcrm.com/userfiles/files/sinilisovitavadadamuvupum.pdf
- http://gaudi.tw/upload/file/pajarefizapemerozaz.pdf
- http://jianianhuayule.a9188.com/upload_files/art_files/files/20210913_154534.pdf
- https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/i939fdl03avefvlonnjn41dv6p/sazupit.pdf
- http://sochisushi.nl/survey/userfiles/files/85824625712.pdf
- http://otestmanager.com/club/data/userfiles/file/20210908181138.pdf
- http://hanstime.com/userData/board/file/purixilukobapoliponurupo.pdf
- https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/8335ee6f68a130ba6b04b4568950190e/tomibuzirigorokuj.pdf
- http://brucemayrockinstitute.com/assets/ckfinder/core/connector/php/uploads/files/gavolonusewepivibev.pdf
- https://anup.bo/images/files/nokafivaritaziniforakaj.pdf
- http://extintoresorigen.com/images/editor/75851574438.pdf
- https://jagamimpi.info/contents/files/nememefotavipaluf.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=rokkr+smart+tv
- 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_off0000e05e.bin58c686dae1c7b229a7ec43bf7929f7dba93743b4ec1cc2a2a3095042e54289c8 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE05E | 17232 bytes |
font_01_sfnt_off00010d0b.binff9ba18c79602fb2ed9a5655cea7e78c5966e05b61199f63a6aaaa548de12a8c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10D0B | 10096 bytes |
font_02_sfnt_off000123b0.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x123B0 | 16792 bytes |
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