MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous embedded URLs, including those hosted on compromised WordPress sites and link farms, suggest a phishing or malware distribution campaign. The document body is heavily obfuscated, preventing analysis of its direct content, but the heuristics strongly point to a link-based attack pattern.
Machine Learning
- Nyx PDF Classifier malicious score 0.9974
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=foye%27s+principles+of+medicinal+chemistry+7th+edition+pdf
- https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e5e2f815f50006dbea9f30e1ddac030d/4258757836.pdf
- http://www.physedu.in/newsite/userfiles/files/35690954106.pdf
- http://basaritarim.net/admin/editor_resim/file/zowufujumexigu.pdf
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/02a125c57d876ff35494d5530a8257c8/51544745679.pdf
- http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d1dc5fd13ff---vamuresexizevisi.pdf
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16096443938f1b---gebajezobupajer.pdf
- http://ildungrice.com/fileupload/fckeditor/file/47027428741.pdf
- http://dokumsuzgec.com/userfiles/files/xetomeludonepedefudeta.pdf
- http://ergo-logo-bamberg.de/userfiles/file/sijizoweji.pdf
- http://apelasyon.com/img/userfiles/files/nepimokinaxugepofo.pdf
- http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/jovop6f1mudrjoqb74scrmscb4/3543154443.pdf
- http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1ef59838e---pogeket.pdf
- http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c57ff3ad36e---rovegosu.pdf
- https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/ec4de31e12f1e0863285c27d86dcdd38/86378332069.pdf
- http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1ff36e276---45249008141.pdf
- https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/fg1dud1lelog500006pf6pg4c5/28179839093.pdf
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/c7e19e8f99f4e8e0b2a9032e347c6556/19649616775.pdf
- https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/c3d33064707434431a1ce1722cd4084a/kepaw.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 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
stream_003_off000100a2.bin225ee779afc066dc532a7fdca0ae70da86964f9b94a6057957dba611cc0cdf21 |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0x100A2 | 21544 bytes |
font_00_sfnt_off0000e891.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE891 | 16792 bytes |
font_02_sfnt_off00012634.bin32d6c41a90458a7a55cdff0f5e1f610f07fa7d5f1a54cf1884dbe0cb4060a71e |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12634 | 11060 bytes |
font_03_sfnt_off00013fe3.bin24c015a9a011c925ee3ab5a5b9a11d71236b3fa0ea13a53c5eb2d3754c26ea4c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13FE3 | 18000 bytes |
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