MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs that point to compromised WordPress upload directories and other disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish for credentials. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9955
Heuristics 6
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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 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://inwebjor.ru/uplcv?utm_term=expiacion+libro+pdf
- https://santevita-bg.com/ckfinder/userfiles/files/sanepatesukimewen.pdf
- https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/6fc08d74d7c59f7216bece3a74452189/86531102228.pdf
- https://v-rshine.com/upload/images/files/76875598126.pdf
- http://propack-th.com/image/upload/File/zidesasubudu.pdf
- http://chicopharm.com/upload/files/newepivaxamatodotoguzof.pdf
- http://mg001.cn/upload_fck/file/2021-9-3/20210903142606386920.pdf
- http://teraval.cz/res/file/bubipegudexijopaduwimefak.pdf
- http://gfk-schwimmbad.de/i/File/lilutolofesotut.pdf
- http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/b833bf8cb2d38abb19816bb67c390f55/22642065409.pdf
- https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/e2114447b6b34c7e53c7b1f01b9be04a/2512999481.pdf
- http://sky1981.com/asset/uploads/files/2118039516.pdf
- https://dreamscapes.ca/dream_scapes/userfiles/files/gosiwonikimoburim.pdf
- https://staging-info.sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/sojufibakulefopi.pdf
- https://psychologgia.pl/Upload/file/9757952871.pdf
- http://spain-ex.com/images/blog/file/25825174519.pdf
- http://triatlonbizuterie.cz/sites/default/files/file/35962748329.pdf
- https://gppacdatabase.net/userfiles/file/demimepisezolerafe.pdf
- https://nnt52.ru/userfiles/file/zupikeloxilesunukaki.pdf
- http://canadanur.com/resimler/files/32628738297.pdf
- http://exteractif.fr/pictures/2/jovasedexinad.pdf
- https://ski-valloire.com/ckfinder/userfiles/files/lusaden.pdf
- https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce2c1511a3---4376607183.pdf
- http://zzquansu.cn/d/files/pemuxemirofelogete.pdf
- http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/7663524396.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_off0000e471.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE471 | 16792 bytes |
font_01_sfnt_off0000fc83.bin4f2e25a8028261efa952bf01fca62231516386860a93aadf0657f5b5bb5ce458 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFC83 | 17472 bytes |
font_02_sfnt_off00012947.binbf2f50249e1b55c9e43545a6a84aad8049d8f0eac0b572603016b32499bfbb93 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12947 | 10440 bytes |
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