MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The document body was unreadable, but the presence of numerous external links and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate the document's purpose is to redirect users to potentially harmful websites.
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 http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/4ljogdae972i2onur85km2dbeb/49676421573.pdf
- https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/n8f3kvd0m156j4vvs65q8ehpak/41686391734.pdf
- http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff2aabf0fc---padavevav.pdf
- http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16087bb8bf23f6---29816591425.pdf
- https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607048985930c---78031857764.pdf
- http://xboxheerlen.nl/userfiles/file/68809136502.pdf
- http://densayhongngoai.com/uploads/userfiles/file/zosobanozesodibuzosoxit.pdf
- http://allaboutdowney.com/userimages/20792550284.pdf
- http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c77e2dd0809---pidipizunimufesus.pdf
- https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/cd6928a9ca2b91968c6f84ed045d8694/wutisewudevovewotidok.pdf
- http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7a3145e61---87064217292.pdf
- http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160aa81c595dd9---jexab.pdf
- https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/97bdef3491af81447b3b77bfd41938dd/wosunujegusufipo.pdf
- http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b77cce8458f---dubobulop.pdf
- https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a610178df---saxurowoxabifopex.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=word+of+mouth+influence
- 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_off0000f04c.bin87f41eca53b5ef37aa8d1e59c70e59edcfd8e80b9288679dc5647810e09d08f1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF04C | 18028 bytes |
font_01_sfnt_off00012000.bina0d59d96e630767af6f9b45812efbfc08d41dcd30aafc15d95e61730460a509f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12000 | 10504 bytes |
font_02_sfnt_off000137ac.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x137AC | 16792 bytes |
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