MALICIOUS
126
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF file contains a large number of external links, a common tactic for SEO manipulation and link farming. The document body, though heavily obfuscated, contains references to 'free feedback form template html' and 'wkhtmltopdf', suggesting a lure to external content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs, including those on disposable hosting, supports a malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
Heuristics 5
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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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://bologen.ru/123?utm_term=free+feedback+form+template+html PDF link annotation
- http://about-central.com/75313527200lulb7.pdfIn PDF document text
- http://taptopbot.com/puppy_vaccination_record_card_printaj7wvu.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_228242c0781648af8fb9c1f968a221d9.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/liwara/nufesar.pdfIn PDF document text
- https://be1b941d-c88c-475c-9260-a39c9d088d9d.filesusr.com/ugd/5c562d_a8d75b818a854165bfd8d8ac74c77df7.pdf?index=trueIn PDF document text
- https://d6236f05-450e-4b96-9875-1783d83c708b.filesusr.com/ugd/912de2_3020b5f20aef4e6e9eb6431f6a85564d.pdf?index=trueIn PDF document text
- https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_f4ea55e266744228a8afaa3b384f021b.pdf?index=trueIn PDF document text
- https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_866af02b34b0485685f844eae02b1b6c.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/16eaf46f-8d75-4d2d-87dd-4dd483ca32ce/how_long_to_be_a_general_dentist.pdfIn PDF document text
- https://s3.amazonaws.com/tasufagijaremo/taderazowinamasej.pdfIn PDF document text
- https://s3.amazonaws.com/voropa/verbos_regulares_conjugados_en_espaol.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3aed2666-6c57-4a05-adc3-f7830d5d7124/mind_diet_tracker_app.pdfIn PDF document text
- https://e7c02ae7-ba66-49ef-8fe7-d4c265c54a1b.filesusr.com/ugd/bc5701_26c89b95a5bc4b1199bcd8a98feef4d6.pdf?index=trueIn PDF document text
- https://f516a5e5-1936-4b34-b436-a929b3a34b8d.filesusr.com/ugd/774001_4eb98e190a724f58b8ddfc6bb428dacd.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/087df31f-c7b2-43b4-9224-ccc587a487a8/58141467613.pdfIn PDF document text
- https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_b3a158da83f5436b843f7a46fcdfe7d9.pdf?index=trueIn PDF document text
- https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_ed447f5ad1ac4380b949d707283ae0af.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/gixawetopoli/domoporunadavakevegolo.pdfIn PDF document text
- https://854397d5-242e-4836-9f1e-4d22a5541959.filesusr.com/ugd/88a329_ae66acc4278f4f8aa6457ba13e57ec18.pdf?index=trueIn PDF document text
- https://3df06c22-1e8a-4082-8cc2-a0fdc0609706.filesusr.com/ugd/d86e81_e4386dadfc2d4f7fb00b662a0e31d8d3.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00011ad2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11AD2 | 5376 bytes |
SHA-256: 19fc85ff65f04887e9f4963ab9ff80cb69ed7963e11f5e4efbf1f15738bafe13 |
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font_01_sfnt_off00012cf7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12CF7 | 10852 bytes |
SHA-256: 3cbfc5ce524154a1fc8e2da260291e9335d718504849d7fe9ca1ed620beff7be |
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