PDF malware analysis — malicious · bf203d4048150e4e

MALICIOUS

PDF

74.8 KB Created: 2021-03-15 06:05:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25

MD5: d9be9824c4713e150038b383e8dc09a3 SHA-1: dc91f4e3c81169a4ad7dde66984276ad8b37412d SHA-256: bf203d4048150e4e9e88f26367e6f06b9fd4c1d16435334f720e2e9b354fbcdd

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://zajinet.ru/123?utm_term=ceftriaxona+eurofarma+bula+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4498376/normal_6049c35f9927e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377116/normal_604ab0a8924b5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4401559/normal_6001e1e1db5d7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4456391/normal_5fd80944f012b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4473656/normal_6000a39a4712b.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
- http://debarunuzijabe.rf.gd/que_es_un_estado_de_derecho_y_en_que_nos_beneficia_brainly.pdfIn PDF document text
- http://lizolubemerawi.epizy.com/libro_para_aprender_a_tocar_guitarra.pdfIn PDF document text
- https://s3.amazonaws.com/xirixepo/abingdon_press_s.pdfIn PDF document text
- https://s3.amazonaws.com/sefipa/sujiwuzokegodowavivebifun.pdfIn PDF document text
- https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_27523ea3bdd94fb9bed8e32343a9be5e.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/b78dabc1-c81b-447a-8d2d-5f3e9f993c03/costco_husqvarna_snow_blower.pdfIn PDF document text
- http://kutepiguzusudax.epizy.com/xawipiferipafakuni.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8069e8ae-567a-4f1c-b040-e5e3a4376f8b/is_it_safe_to_eat_salad_from_a_restaurant_during_covid.pdfIn PDF document text
- https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_a1ef757d9d81444bbe8e9eb41b0f2edb.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/nemafu/74178644428.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/52d5e5a6-b7ba-4186-8135-e15f76f6bb23/59217616007.pdfIn PDF document text
- https://ee6bc897-aa08-459d-b6e6-b1b1d69fcba1.filesusr.com/ugd/7ba596_d20f8c9a6935434c82b6d9b8dabada69.pdf?index=trueIn PDF document text
- https://bc260b4e-efc2-469d-9102-9c7234992d76.filesusr.com/ugd/b1b3ad_c0b1b126e2354a9e856174fc2fe1f936.pdf?index=trueIn PDF document text
- https://3c8d80e7-2998-4b53-b1db-ea2053e4eee2.filesusr.com/ugd/5c8c55_fbd8ce9c500f43c08cf95fd84c749c43.pdf?index=trueIn PDF document text
- http://gegokuberil.rf.gd/wawis.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f4c51bb0-1aeb-4139-b6f4-d13fd36c34b6/good_career_development_goals_examples.pdfIn PDF document text
- http://jemowefodidalo.rf.gd/gaxiwugeko.pdfIn PDF document text
- http://fimekozuf.rf.gd/atlassian_bamboo_documentation.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_off0000d55a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD55A	5124 bytes
SHA-256: `85491534f50499ecc08844f82e58528dbb319080f41a339ec5b2b48aed073eed`
`font_01_sfnt_off0000e6ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6AD	12808 bytes
SHA-256: `826108249d3ff04be540e5648a8894a458d27959fac135d9763972d05d40ce22`
`font_02_sfnt_off00010e3c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E3C	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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