MALICIOUS
204
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF 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 employs social engineering by luring the user with a fake download or browser update prompt. The embedded URLs, while many are unknown or benign, include links to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute further malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9909
Heuristics 8
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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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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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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 http://kolbiko.com/images/uploads/file/kupofo.pdf In PDF document text
- http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160808d2ac5a35---nininawutufutusijaja.pdfIn PDF document text
- https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074a72e6a441---69578797654.pdfIn PDF document text
- http://hndgyl.com/v15/Upload/file/2021862335355482.pdfIn PDF document text
- https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/56442dc9ef98f8a527911ce55a7a525d/detovijivuja.pdfIn PDF document text
- http://acril.ru/ufiles/files/zokonunilerudefisamevosuf.pdfIn PDF document text
- https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16087d2e9a4a17---80844768001.pdfIn PDF document text
- https://ibericadearmerias.com/file/27822013265.pdfIn PDF document text
- http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/16029523444.pdfIn PDF document text
- http://mikailang.net/userfiles/file/20210724020631_1088062636.pdfIn PDF document text
- http://citadelcaralarms.com/userfiles/file/85666047576.pdfIn PDF document text
- https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/jmak75rftg8an90nr0llo0mv7h/46068026401.pdfIn PDF document text
- http://skidubravy.sk/spravca/ckfinder/userfiles/files/disutotus.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b32c6b42e67---90968099194.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160fba2b4d606e---walubafepagatemilanezer.pdfIn PDF document text
- https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/356941e5aff4a644c742c2949879a594/xazot.pdfIn PDF document text
- https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/dd3df9f677e5f29eddf350e75d5161cd/xetabejufiwedetorese.pdfIn PDF document text
- https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/evtavc71icip1o1vq5i3fvgge1/lalepofotajalugoworomu.pdfIn PDF document text
- https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/3up76slec61n22q5nf6f9rc1ci/dodapiwujupokugovokar.pdfIn PDF document text
- http://meble-tk.pl/userfiles/file/boniniza.pdfIn PDF document text
- http://flexa.cz/docs/file/jarunuvaxusug.pdfIn PDF document text
- http://scoutpate.com/userfiles/file/19633234008.pdfIn PDF document text
- https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/e18a3a63dc667959077ab217fab62ae6/rawufukuvilowugibugojutev.pdfIn PDF document text
- https://augsburger-dartliga.de/uploads/file/15749033638.pdfIn PDF document text
- http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/2830be7ad3f1fe366d4528b55a712784/xuwenidum.pdfIn PDF document text
- http://cambresisemploi.fr/ckfinder/userfiles/files/gufolegosibuw.pdfIn PDF document text
- https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/0203b231b915b9eb252799ee8ad65076/viruratawujobobititirur.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=pcsx2+1.4+0+free+download+with+bios+and+pluginsPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- 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_off00011570.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11570 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off00012d87.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12D87 | 11764 bytes |
SHA-256: 8ef2d6849845c698866024fba455345a24329f09e033fa60e55ccd197169c516 |
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font_02_sfnt_off00014952.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x14952 | 18744 bytes |
SHA-256: 64be9a41d6f36e2dd0aedb10f96139ae55b0c32fc43ea640d68abbe3886edeb4 |
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