MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF sample was flagged as malicious by multiple heuristics and a machine learning classifier, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The file's structure and the nature of the URLs indicate a phishing or malware distribution attempt.
Machine Learning
- Nyx PDF Classifier malicious score 0.9974
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 to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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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=scripture+on+the+crucifixion+of+christ
- https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160794f3d1d0b3---53704944427.pdf
- http://velkoobchod-man.eu/ckfinder/userfiles/files/voluzi.pdf
- http://dragonera.cn/admin/userfiles/file/86599300447.pdf
- https://twfern.org/upload/ckfinder_temp/files/20210607064716.pdf
- http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/vnm20cmpi11gqe7s4jm3j14sn2/19663535130.pdf
- https://sanipro.ma/app/webroot/uploaderfiles/derut.pdf
- http://gostinica-domodedovo.ru/files/5695936517.pdf
- http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kosisalujajetovajuw.pdf
- https://diarch.in/WYSIWYGImage/file/52849218389.pdf
- https://saunadlaciebie.pl/userfiles/file/minaxifoji.pdf
- https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/65d1424f12a06145f956cad8bad12b93/bimadodebisexizi.pdf
- https://hanahana.vn/media/ftp/file/30219723669.pdf
- http://daotaonhaccong.com/uploads/userfiles/file/86361968451.pdf
- http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9e16bb559---sexedewezepabezude.pdf
- https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/4b4803631339a4dfb13355c13573d74c/5061861677.pdf
- http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7d095425ca---65962504601.pdf
- http://jadeite.ru/images/file/80177821365.pdf
- https://gute-reise.ru/i/files/files/40418386406.pdf
- https://cmsschoolkg.org/userfiles/file/texojerojakegufomebasup.pdf
- https://kocarbon.vn/luutru/files/sidanosiwenolodusuzuwi.pdf
- http://litho-and-co.fr/ckeditor/upload/files/68562185123.pdf
- http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/g4jk2mmrgkahp2vdsdfcppskq2/8010037011.pdf
- https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/6669b54da660af936b13801971a5edf8/rixuk.pdf
- http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/ppbiljnf98dh8jefga70ukfrop/85730496772.pdf
- https://alianzatours.com/imagenes/file/65609691138.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_off0000f358.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF358 | 16792 bytes |
font_01_sfnt_off00010b6a.bin3a3404f0525046b136abfef6aee5c02af5f0eb6b6b15fbc4f629b061769beccb |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10B6A | 17636 bytes |
font_02_sfnt_off000138cb.bin28d656e1f9555fb534a20098b2cd9ce94b6530fff38b95f59d80deeae3a5c2e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x138CB | 10648 bytes |
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