PDF malware analysis — malicious · a0866eca4c7454bb

MALICIOUS

PDF

85.0 KB Created: 2021-04-27 16:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07

MD5: 29beb45fabb9efcc7056255a5871c883 SHA-1: 13be4322addf07722f0449b228e799413f4db203 SHA-256: a0866eca4c7454bbe09e4feba4213158d13502f4467fc79923252c74af324f0e

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains references to 'Red pyramid ending summary' and 'wkhtmltopdf', indicating it's likely a deceptive document designed to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small 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.
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://bologen.ru/strik?utm_term=red+pyramid+ending+summary PDF link annotation
- http://sikewogewetonos.iblogger.org/cladogram_worksheet_answers.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389355/normal_6043ea8a1c4a1.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4472763/normal_5ffda676746f8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470552/normal_6014165d6bd51.pdfIn PDF document text
- http://opendouche.xyz/cuanto_equivale_una_pulgada_y_media_en_milimetroshc9vm.pdfIn PDF document text
- http://bepevekebezupu.22web.org/learn_python_programming_step_by_step.pdfIn PDF document text
- http://maslovauto.ru/quadra_fire_gas_stove_manualxotcl.pdfIn PDF document text
- http://salopkisa.website/javafasumulomxoohp.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4494166/normal_603a9a78a68ae.pdfIn PDF document text
- http://beach-fruit.fun/429385184179ujz7.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4450415/normal_5fe0bf4ea1d39.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4377095/normal_5ff1753c5dc49.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4403283/normal_5fcf29795d259.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470016/normal_602cfb6928495.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/99e1e3f7-c529-4390-893a-d8cee294dcb4/26827761001.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/59581047-653d-4eaf-9684-dd021e320a06/how_do_i_use_my_phone_as_a_remote_for_my_samsung_smart_tv.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/27257af5-e5d6-4bd1-8dae-4fd867dee89c/colorado_6th_grade_science_standards.pdfIn PDF document text
- http://xevivalekivo.epizy.com/24325598912.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
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e81b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE81B	6440 bytes
SHA-256: `629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e`
`font_01_sfnt_off0000f80f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF80F	5356 bytes
SHA-256: `37c31a69aafc07fc29cef42f7dbc947a5f60b8a6a55a2cd628b71bcc514c3244`
`font_02_sfnt_off00010a42.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A42	11172 bytes
SHA-256: `be1f5630c8dc074e4fe61e520b3f245920a54312787da7ebf9e5d11dbfcf16f9`
`font_03_sfnt_off000130f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x130F8	16264 bytes
SHA-256: `3fa6e571c3f08a0cf4ae512c3378d9f3521510e3827d8bb666ac1da6bca85c13`

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