MALICIOUS
116
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF document contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to host malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is a pretext for a callback phishing or tech-support scam. While no scripts were explicitly extracted, the ML classifier strongly flagged the PDF as malicious, and the presence of numerous external links supports a malicious intent, likely to redirect users to phishing sites or download further malware.
Machine Learning
- Nyx PDF Classifier malicious score 0.9947
Heuristics 6
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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://drafthe.ru/uplcv?utm_term=unsend+sms+android
- http://pieseclimaauto.com/files/file/40717394360.pdf
- https://ghnservizi.com/file/sovetusibu.pdf
- https://www.jakketoes.be/ckfinder/userfiles/files/43653341824.pdf
- http://ferien-in-zahren.de/images/file/86496169479.pdf
- http://arc-en-cielproduce.com/ckfinder/userfiles/files/vugajev.pdf
- http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8bb830f36---13978291815.pdf
- http://theponghop.com/upload/files/piben.pdf
- https://rsun.pro/admin/ckfinder/userfiles/files/janoxefetunuzozem.pdf
- https://csmgh.net/pevron/www/img/file/57572789644.pdf
- http://marchmontnews.com/imgs/file/56755164469.pdf
- http://www.haztartasigepszakuzlet.hu/pics/file/432885575.pdf
- https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/161392c8d6c554---negekudima.pdf
- http://www.singchai.co.th/ckfinder/userfiles/files/fafup.pdf
- http://premiumcsp.com/uploads/files/molimiragu.pdf
- https://robodom.si/files_vsebine/kuzerameleduxanim.pdf
- https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/evm18r874hlbmh5892oqj06jr4/54955428393.pdf
- http://efcosmetic.com/uploadfile/files/1374615875.pdf
- http://suchanekstomatolog.pl/files/file/pelebazezapude.pdf
- http://umbabox.com/userfiles/file/28155328384.pdf
- https://abicecream.ru/ckfinder/userfiles/files/93176791502.pdf
- http://duhochoangthanh.com/upload/files/vijepezamesikidirove.pdf
- http://abwmarlboropike.com/uploads/files/43236986683.pdf
- https://o2opr.co/userfiles/files/18459445059.pdf
- https://relaxbotanika.cz/ckfinder/userfiles/files/benukarujagapisefimebegit.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_off0000ec7b.bincaeb5b2b1791497c42476468598a04363d8503298ea01c8057276ba78bd5c858 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEC7B | 18232 bytes |
font_01_sfnt_off00011b60.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11B60 | 16792 bytes |
font_02_sfnt_off00013377.bin9fd2f0e4cd56ead8273c576cce484653c1c109bab8b3f34e1e5816dca4d3b1c5 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13377 | 10272 bytes |
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