MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the presence of external links and the overall heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9917
Heuristics 6
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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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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://chcial.ru/uplcv?utm_term=marketing+strategy+assignment+pdf
- https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/a63b012a4f7115d6ab0e1895f34eafc9/97474637107.pdf
- http://synhbio.com/upload/files/fizasozemirufafajurinon.pdf
- http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/93d40ec9e6538b77b08a100e54283f6f/deziwosavanu.pdf
- http://www.greddy.com/admin/common/ckfinder/userfiles/File/1714039114.pdf
- http://chornakorn-packing.com/ckfinder/userfiles/files/lowadugosexilorejaxus.pdf
- https://arerp.kr/data/file///44581565289.pdf
- http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1613969aebd0cd---26045394371.pdf
- http://aasghsflqsae.handylover.com/upload/files/73614020555.pdf
- http://hotelgiottotorino.com/userfiles/files/kevukavipaje.pdf
- http://iiiemjobs.com/FCK_Editor_Images/files/85890575853.pdf
- http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/161334fc63a1e1---rezadebawodubegara.pdf
- http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/98041313580.pdf
- https://lucky-erotic-massage-bucharest.ro/ckfinder/userfiles/files/fenaxevizabub.pdf
- https://mimpishio2.com/contents/files/40394318696.pdf
- http://computerdoki.hu/user/file/lapumikiwewowevibadavu.pdf
- http://www.tahi.hu/ckfinder/userfiles/files/zamikikavojusafevafam.pdf
- https://arrad.ch/modules/ck/ckfinder/userfiles/files/putezivegixid.pdf
- http://foxgraphics.paulsfashion.in/files/ralojamoleboziduve.pdf
- http://hotelpenza58.ru/ckfinder/userfiles/files/kepuvip.pdf
- http://adamlegal.com/userfiles/file/jenewafopupepatilasis.pdf
- http://stagticket.com/fck_upload/file/33912853657.pdf
- https://zd-zeta.com/uploads/files/202109062050539350.pdf
- https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613172f8add65---fawesabaruna.pdf
- http://netmode.net/app/webroot/uploads/files/bukurisem.pdf
- http://studiofantino.it/userfiles/files/zewivikirobos.pdf
- http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/kobegutuminoliji.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_off0000dc67.bin3c734af6c3134f1bc390ddcecd8666585a4ea16740fc5b9dfe34d8d7d415c59c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDC67 | 16376 bytes |
font_01_sfnt_off00010666.bin8b02c2e72519b665d26112f91540c0306744dd7e5ed0875e2c15a4412f3daf14 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10666 | 10872 bytes |
font_02_sfnt_off00011f57.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11F57 | 16792 bytes |
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