MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm for SEO manipulation or malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9959
Heuristics 7
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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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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://chcial.ru/uplcv?utm_term=african+american+museum
- http://myjobcareer.net/userfiles/file/2021061910300773499.pdf
- http://slsnn.ru/content/file/51393122596.pdf
- http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16071a17d7cec7---wazemubulubovusinedaw.pdf
- https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2b8b240030---bilasubav.pdf
- http://anhuizhkj.com/upload_fck/file/2021-5-3/20210503093227843775.pdf
- http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/8eqve85n2mv13r13goi93vt6s1/bejuwuke.pdf
- http://princeworldwide.com/multimedia/userfiles/file/42093677386.pdf
- https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c84f304b9---44379703119.pdf
- https://zlatartopalovic.rs//files/36848607357.pdf
- http://www.derbysignandgraphics.com/uploads/file/20284608480.pdf
- http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160a4cf8a9bfca---xafedadakovanexit.pdf
- http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/ma4nfndl5kun4nbiv525thp2lc/nimet.pdf
- https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b57eb40abb1---rexirize.pdf
- https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae35bf325f---92264914045.pdf
- http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf96f102b18---saxazip.pdf
- https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d609c236b---74537580572.pdf
- https://haps.company/wp-content/plugins/super-forms/uploads/php/files/1tr41vk52289i5b12e905n40g7/68903748547.pdf
- https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/1031c86e93d292720002b43ef3d2163b/pogometowesepisomine.pdf
- https://cgeminfos.ma/upload/file/jeser.pdf
- http://almar-bus.pl/userfiles/file/82629060311.pdf
- http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/5eb4cd5b0677f0e6264e6c201b7da28e/kuwumazewelox.pdf
- https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/c20178797e06c63d800e3957b0746fd5/vitogatikisutadepup.pdf
- http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/sovuge.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_off00013ee7.bin2e5367f82d4feb145d8be0dd2d39bf177460983ef04d9f9c12f994198d494b4b |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13EE7 | 17432 bytes |
font_01_sfnt_off00016ca3.bin6e806eff39e98d79c0af93eaa866f228b09c021e9573d2f79b94bd4f549d5197 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x16CA3 | 10312 bytes |
font_02_sfnt_off000183d6.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x183D6 | 16792 bytes |
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