MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains numerous embedded URLs that form a link farm, directing users to potentially malicious sites. Heuristics indicate these links are hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via a spearphishing attachment.
Machine Learning
- Nyx PDF Classifier malicious score 0.9947
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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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://krisoc.ru/uplcv?utm_term=heathrow+express+map
- https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/4696245e7ff7c784c7fc60e2fbc095f1/63175834575.pdf
- https://szekszardportal.hu/userfiles/file/miwumo.pdf
- https://unicon-msk.ru/data/files/sosakimusikozutoxi.pdf
- http://nissanotogovap.vn/uploads/images/files/73357839134.pdf
- http://juentai.com/userfiles/files/rovikonibaporug.pdf
- http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/161443ac1e1dd9---9099330257.pdf
- http://aminotp.com/upload/files/69481061512.pdf
- http://antansconstructions.com/ckfinder/userfiles/files/govuzebekewoxes.pdf
- http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613b55a5acae1---lugufitivivemafedirolaluz.pdf
- http://fipjp.com/userfiles/file/64772291909.pdf
- http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161318f480438c---17576402920.pdf
- http://demkapi.com/resimler/files/lalezawunelinixa.pdf
- http://lejuriste.ru/files/file/49228135855.pdf
- http://joeun-it.com/userData/board/file/79082424844.pdf
- https://yoimart.com/upload/file/20210916214219.pdf
- http://tikatalog.sk/_files/file/38617362728.pdf
- https://benhgout.net/uploads/Files/file/wutupilegodupeguxod.pdf
- https://perkunasstudio.com/uploads/files/202109040807454347.pdf
- https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/senituta.pdf
- https://godahoian.com/app/webroot/upload/files/wapilisipowizakebibo.pdf
- http://basumati.com/app/webroot/ckfinder/userfiles/files/40324589473.pdf
- http://shriadinathbank.com/uploads/58992508247.pdf
- http://msnladyboy.com/ckfinder/userfiles/files/zegeviwatatatigunole.pdf
- https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8f82cb784---53545741432.pdf
- http://studioferrato.it/userfiles/files/fejomiwuj.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_off0000c494.bin5a8ee8216318b6d85ef9a561d62bebd458d1bdb64173b2128eeb231c07a4bc66 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC494 | 17584 bytes |
font_01_sfnt_off0000f204.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF204 | 16792 bytes |
font_02_sfnt_off00010a1b.binb475f77b6b3b4c3d2232a03fd77cc16773de48be8485498c419920a49105d6b7 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10A1B | 10456 bytes |
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