MALICIOUS
176
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The heuristics indicate it functions as a link farm, directing users to various compromised or disposable hosting sites, likely for a phishing or scam campaign. The presence of embedded URLs and the 'SE_CALLBACK_LURE' heuristic suggest the document is designed to trick users into visiting malicious links or potentially calling fraudulent numbers.
Machine Learning
- Nyx PDF Classifier malicious score 0.9833
Heuristics 7
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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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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://laborke.ru/uplcv?utm_term=the+little+schemer+pdf+download
- https://termoformat.md/img/files/38354902923.pdf
- http://auxerretv.com/content/public/file/febabegofumozadoke.pdf
- https://master.plus/wp-content/plugins/super-forms/uploads/php/files/9955bb725440e7b7690413e3ec49a950/wozawoj.pdf
- https://bacsionline.net/userfiles/file/48187703320.pdf
- https://www.padanguparduotuve.lt/ckfinder/userfiles/files/64786322305.pdf
- https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/92359e343a7efd6430d1fbc9e9685d31/fezetozisolofurixebojul.pdf
- http://verkaufs-akademie.com/userfiles/file/40952644886.pdf
- https://hoatuoi360.vn/uploads/files/13818676098.pdf
- https://abyway.lv/images/ck_images/files/vodarovovizij.pdf
- https://tiemhoamo.tiemhoahaibara.com/data/dulieu/files/pudiwajixaxorevepum.pdf
- http://baiduvpn.com/upload/files/72962076208.pdf
- http://ferramentabelleggia.it/public/file/97073594582.pdf
- http://lotusburbank.com/uploads/files/jovivalinolikivufivumag.pdf
- https://dwitunggaljaya.com/sitefiles/file/lolofep.pdf
- https://willmarareachamber.com/ckfinder/userfiles/files/66355023262.pdf
- https://cpsguffanti.it/uploads/file/69335623788.pdf
- http://avtokapriz42.ru/userfiles/file/zujivi.pdf
- https://mepho.hu/ckfinder/userfiles/files/wakevasarivesatofu.pdf
- https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16141d6b4bc6c7---xavafizikojo.pdf
- http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/161442e05001bf---bojexuzexesag.pdf
- https://comillaspostgrado.es/userfiles/file/jodazupevenatolola.pdf
- http://agavietnam.com/img/files/37064070402.pdf
- http://www.lbtfilm.com/uploads/files/sowamonodogifivobevi.pdf
- https://soechi.id/userfiles/file/67688339267.pdf
- http://storemisr.com/uploads/files/tafaz.pdf
- http://barsugo.com/ckfinder/userfiles/files/nidovalubif.pdf
- https://astefin.ro/ckfinder/userfiles/files/jukebasemunidolikinimob.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_off0000ddc1.bin1390b89b36bb6f35ead5147e2460efd6c43b5a8664a1d46457c4428b334c5d7e |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDDC1 | 17644 bytes |
font_01_sfnt_off00010ba1.binb4a6d3d07c9fcf6faa0f133d6527d141c7887d84e479a23cea6db2ca9b0b1e75 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10BA1 | 10932 bytes |
font_02_sfnt_off000124d0.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x124D0 | 16792 bytes |
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