PDF malware analysis — malicious · f2620b9b7d3b4bbe

MALICIOUS

PDF

143.4 KB Created: 2021-03-25 05:17:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: dbfb686d0faa90507b1ca677c44b7d98 SHA-1: d10941d298d36085cee1ba8b295b7b0a1ff3c012 SHA-256: f2620b9b7d3b4bbeb56987120e0502c30587955473b449e6f66f87e711bc6840

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains multiple embedded URLs, with several pointing to suspicious domains that are flagged as unknown or potentially malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

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://vilenefex.ru/award?keyword=baptized+and+sent+pdf PDF link annotation
- http://termometr-medikal.site/aabb_tech_manualctb3s.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4448539/normal_600c678a68b6e.pdfIn PDF document text
- http://ideaita.fun/mofixazetovaxufidizupxxdx.pdfIn PDF document text
- http://ru-order-687646765445.art/xinubamatugizaky12da.pdfIn PDF document text
- http://vsedlyatebya.xyz/v_moda_crossfade_2_codexqwrj0.pdfIn PDF document text
- http://robertferrell.net/mandated_reporter_laws_floridadin5p.pdfIn PDF document text
- http://fefosawixamuwow.22web.org/uniforme_corinthians_2009.pdfIn PDF document text
- http://static-get.top/xoxapuzeludedobimamigati5wo4e.pdfIn PDF document text
- http://sakhavto.ru/62594116566h40q5.pdfIn PDF document text
- http://youralteragoods.com/699310030067r4by.pdfIn PDF document text
- http://blekrossi.ru/how_to_change_background_transparent_in_paintwv1j1.pdfIn PDF document text
- http://naturwow.space/2nd_line_apk_premiumdjs5g.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4482027/normal_6058da9fcd0aa.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://padekapekalerel.rf.gd/free_printable_comprehension_worksheets_year_6.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9eaef900-c383-436d-a997-3793e5d9377e/jesukubagisapunuvavifu.pdfIn PDF document text
- https://s3.amazonaws.com/gedesisumi/pisixabafeki.pdfIn PDF document text
- https://s3.amazonaws.com/levovod/wigemewejomimur.pdfIn PDF document text
- https://s3.amazonaws.com/xeponodij/free_resume_templates_for_software_engineer.pdfIn PDF document text
- http://xetobagog.rf.gd/bibilawageru.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/78394dfd-8933-4a52-bea3-2e7a95c8da52/do_toyota_corollas_have_transmission_problems.pdfIn PDF document text
- http://babudenipovux.rf.gd/ginirili.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bf764b6e-bac9-4721-a1aa-d2702794a35a/pigisovejeg.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ad9fdd54-37ed-44e3-902f-286defc3faee/ms_project_resource_type_cost.pdfIn PDF document text
- https://s3.amazonaws.com/donake/zinawa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/69956d0f-bf51-4964-b95c-d8f456ba2bbb/43598964641.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_off0000f71b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF71B	85188 bytes
SHA-256: `9f33922f5c005a2b3ef87ace004ae5c6094b143f8117b16e7503f2052b200155`
`font_01_sfnt_off0001f647.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1F647	5008 bytes
SHA-256: `ffbc0780c313356e9f49e6f77f41fc60b90ca7df4230d6d0bc8344ad53451462`
`font_02_sfnt_off00020772.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x20772	10996 bytes
SHA-256: `42777481eeac6c25f7bdce269650377571d39f7b775fb6c53393efe61085321c`

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