PDF malware analysis — malicious · 4808098d03758b7f

MALICIOUS

PDF

89.1 KB Created: 2021-05-22 19:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: f2e94d3e8824f0d5536749f179d64dfa SHA-1: d2ccebd527a87674e9a020baec5aad5a5dc443dc SHA-256: 4808098d03758b7fb0c1e071de82c25babcef80e645580afc50c07e22c5bd77f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many of which are likely part of a link farm designed to obscure the true malicious destination. The primary URL, 'https://lozipotod.ru/strik?utm_term=how+to+prepare+salary+structure+in+excel+format', suggests a lure related to financial documents. No scripts were extracted, but the PDF structure and numerous embedded URLs indicate a phishing or redirection attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small 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.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The 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.
Embedded URL info EMBEDDED_URL

One 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://lozipotod.ru/strik?utm_term=how+to+prepare+salary+structure+in+excel+format PDF link annotation
- https://cdn-cms.f-static.net/uploads/4366343/normal_603181ca8d205.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4464730/normal_5fe87d97e5759.pdfIn PDF document text
- https://vilinumatilaji.weebly.com/uploads/1/3/2/7/132740241/zakutadej.pdfIn PDF document text
- https://sutulozutujak.weebly.com/uploads/1/3/4/8/134884412/1224722.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4475563/normal_601cde085e65f.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://s3.amazonaws.com/bifadiwuwileji/pojexurowogikopofijenure.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7fc3759c-5771-4e72-880e-6c4685d5ec6b/5320909644.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/87b22034-1ce8-45af-83be-add371d561d8/despertando_al_gigante_interior_libro_gratis.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e4770ad7-219e-436b-9557-f6d8c967d267/tuvigodafixode.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6de6e099-4819-4b49-bb6c-53fe8c2b6fe8/how_much_does_it_cost_to_install_a_new_tankless_water_heater.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/878b26f3-830c-4289-a83a-ceaefab1a945/dell_optiplex_9010_all_in_one.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8a64022e-c882-4e1d-a17f-a057ebf54857/ruzoxinuf.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3cad1578-571f-4596-a580-ade2e50c085b/how_to_fix_ice_buildup_in_samsung_refrigerator.pdfIn PDF document text
- https://s3.amazonaws.com/lekizopiloref/poquito_mas_menu_burbank.pdfIn PDF document text
- https://s3.amazonaws.com/wonumafubij/19242382921.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/84e1c69d-e31e-4619-9720-57948162beab/hitachi_c12rsh_for_sale.pdfIn PDF document text
- https://s3.amazonaws.com/lakujusitejojet/panasonic_kx_tes824_maintenance_console_software_windows_7.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6925175e-2139-4840-b0ee-f69dc6f2cd13/nigagutezuxabifi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ea6043c7-8d64-46b0-ad99-d39b30b45091/oedipus_rex_critical_analysis.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5bf88a3e-1cdc-4b5d-a6d7-484641ceb526/gonulipamikemob.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001120d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1120D	5268 bytes
SHA-256: `8c882ae6c86bf982c423a8c346864422a6a09981aa2bd8668bff10be71769868`
`font_01_sfnt_off000123f3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x123F3	10664 bytes
SHA-256: `d98975ce69d1a04b7690a4c05241573f05d6fa3042cb4a6c5f1411d50dfe13ba`
`font_02_sfnt_off00014882.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14882	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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