PDF malware analysis — malicious · 4497d6245bcb9ebe

MALICIOUS

PDF

77.7 KB Created: 2021-03-09 14:45:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23

MD5: 48fbd38ec13b139142368bdbe6676aac SHA-1: 987bf2710bb7643f2807953ab8b5f402995f600a SHA-256: 4497d6245bcb9ebe88bad42ac9a6de1704713377883f52ff4fdfcab2c4351140

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URIs pointing to suspicious domains, such as https://midufefew.ru/, which are likely used to host phishing content or distribute further malware. The PDF structure and embedded links suggest it is part of a phishing campaign, likely delivered as a spearphishing attachment.

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 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://midufefew.ru/123?utm_term=impresora+brother+dcp-+l2540dw+manual PDF link annotation
- https://cdn.sqhk.co/xelajuwodaf/iiefkge/38390389678.pdfIn PDF document text
- https://cdn.sqhk.co/riroxale/5heSjdc/bounce_tales_game_nokia_download.pdfIn PDF document text
- https://cdn.sqhk.co/bitowiso/gyknxie/mobile_application_project_manager_resume.pdfIn PDF document text
- https://cdn.sqhk.co/xisalaximel/d0jaNaU/yellow_book_cdc_colombia.pdfIn PDF document text
- https://cdn.sqhk.co/xexerekija/hduEjfI/race_master_manager_mod_apk_1._0._140.pdfIn PDF document text
- http://bebetadiruj.mywebcommunity.org/1336630623.pdfIn PDF document text
- http://fupefabesosada.mygamesonline.org/4592081854.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://uploads.strikinglycdn.com/files/fb731ce8-5c82-42d6-a623-01c74d07a787/gamma_world_4th_edition_character_generator.pdfIn PDF document text
- http://korofituzuxigu.onlinewebshop.net/tnpsc_hall_ticket_download_file.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7a9cf763-9d3a-4b4f-af22-deb58b35acec/87140401581.pdfIn PDF document text
- https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_6b171f2cef2c4ac283bf54e39d7c198d.pdf?index=trueIn PDF document text
- http://gozenabuzixi.onlinewebshop.net/gidelowufidipetefozuveno.pdfIn PDF document text
- https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_e30fcdd2f0c44529b20fbce5336c8873.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/ef1ed14c-2d96-453d-9722-a7e5dbeeb1ac/99508701134.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/88a59207-69d7-45fa-8c1c-116568864ebb/95111639226.pdfIn PDF document text
- http://tikomiwewo.atwebpages.com/jepozi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b056c1a7-8a9e-4811-921f-9e18bb7ea45a/what_is_the_home_depot_dress_code.pdfIn PDF document text
- https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_ed63454f5b2f4337825cc050876ddf50.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/ab35d8da-8d74-4641-8342-ffbee712a173/how_to_reset_a_linksys_wifi_extender.pdfIn PDF document text
- https://64f1e6a9-4530-4009-9f9b-67b91dd69f79.filesusr.com/ugd/76b6de_27455b81afba4ea68c8e1ddc5c6f2647.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e0fc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE0FC	5836 bytes
SHA-256: `2391700d926e8870075baee366d0cda455278d6a367bd645449521186e555ee8`
`font_01_sfnt_off0000f4c8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4C8	11276 bytes
SHA-256: `744bb920826ec934e71de24aaa508085d07dffb4a0da6037d8710712adf7307b`
`font_02_sfnt_off00011b41.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B41	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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