MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Numerous heuristics indicate the PDF acts as a link farm, directing users to compromised CMS uploads and disposable hosting sites. The embedded URLs, such as 'https://smidgel.ru/uplcv?utm_term=it%27s+marvin+gaye+let%27s+get+it+on', likely serve as lures for phishing or to download further malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9991
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://smidgel.ru/uplcv?utm_term=it%27s+marvin+gaye+let%27s+get+it+on PDF link annotation
- http://jatyn.cn/upfiles/202108/file/1628495509.pdfIn PDF document text
- http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd8b019f11---zorisoluwo.pdfIn PDF document text
- http://kroonzuivel.nl/ckfinder/userfiles/files/nibomujaweso.pdfIn PDF document text
- http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/4dc4bcc478d90466182dee863a0208ce/kavanufodesowev.pdfIn PDF document text
- http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608faddcc9b53---vamawigibixuditur.pdfIn PDF document text
- http://kcpsystem.com/userData/board/file/fipewizefe.pdfIn PDF document text
- https://firsatpin.com/calisma2/files/uploads/39190218696.pdfIn PDF document text
- https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16077e1da31d5a---23704869969.pdfIn PDF document text
- http://atthaya.com/file_media/file_image/file/89364770763.pdfIn PDF document text
- http://sergeybazarov.ru/file/dejekugujowidupegij.pdfIn PDF document text
- https://ludifrance.fr/userfiles/file/94567527607.pdfIn PDF document text
- http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9b3451d679---zonodoper.pdfIn PDF document text
- http://inwallendorf.de/userfiles/file/zitesumagufoxekogem.pdfIn PDF document text
- http://esoftland.com/userfiles/file/89718982376.pdfIn PDF document text
- https://phoenixturkey.com/upload/ckfinder/files/kiporutebamirofuwidedadid.pdfIn PDF document text
- http://jnnycc.org/userfiles/file/pevanuzolipiza.pdfIn PDF document text
- https://clinic4lab.com/upload/ckfinder_temp/files/20210619140855.pdfIn PDF document text
- https://maymac.info/userfiles/file/zivitakadaxowutodep.pdfIn PDF document text
- https://kalyna.ua/sites/default/files/userfiles/file/rotupaputa.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000b451.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB451 | 10616 bytes |
SHA-256: 742116b78475c3b0ab87da7904f978f3c200750e7fea32023ff0a2c093c90a68 |
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font_01_sfnt_off0000cca2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCCA2 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off0000e4b4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE4B4 | 16164 bytes |
SHA-256: 05cb01cfaccbc5b9dcd0204b3c9c27bea57f5733acd5cbb2dcc3a023807258c0 |
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