PDF malware analysis — malicious · c3ae3478b86aaf5c

MALICIOUS

PDF

78.7 KB Created: 2021-04-05 10:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: 33c74c4f488db553aa9311adebfa506c SHA-1: dbd7ab9973fdbe5bf44c2596af794f1033f278f5 SHA-256: c3ae3478b86aaf5c1d01434ceef41daaec2dc631fbb3068b21c21b064d065d5a

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. The PDF contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating the document's purpose is to redirect users to potentially harmful 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://resalured.ru/award?keyword=berichtsheft+vorlage+pdf+shk PDF link annotation
- https://cdn.sqhk.co/xubulozirod/XoacDKx/30_ways_to_die_in_minecraft_mythpat.pdfIn PDF document text
- http://waragofekoxexaz.sportsontheweb.net/kizigulowoxeporuma.pdfIn PDF document text
- http://xufamorazogubov.sportsontheweb.net/acls_manual_de_bolsillo_2020.pdfIn PDF document text
- http://kixiwogazu.sportsontheweb.net/46141164097.pdfIn PDF document text
- http://wubujonil.getenjoyment.net/playwriting_101_glossary.pdfIn PDF document text
- http://ruvinowuge.scienceontheweb.net/how_do_i_trade_options_on_thinkorswim_app.pdfIn PDF document text
- http://fovikoxesaweziz.medianewsonline.com/computer_architecture_and_organization_by_john_p_hayes_tata_mcgraw_hill_1996.pdfIn PDF document text
- https://cdn.sqhk.co/sunaxidida/dlidggu/wepabeno.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://55f5e71c-5f54-469f-9449-301c43944234.filesusr.com/ugd/bbdb65_fa38a196fc4d4130a2ff8e2afbfbcdf6.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/fupanabivote/triple_bottom_line_csr.pdfIn PDF document text
- https://e5720c39-3c1c-4a52-9be9-509675281b5a.filesusr.com/ugd/0010c8_37304f3d953744a88d768199ab9186e7.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/bubeto/keyboard_music_books_for_beginners.pdfIn PDF document text
- https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_e7e300b65fba405ba14239b6c8be56eb.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/0a9a7a05-c5b3-4721-8045-700beac97b29/strengths_and_weaknesses_of_research_articles.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b1e368fd-b88e-4fcf-b014-a46f333a0733/iowa_code_633.238.pdfIn PDF document text
- http://fubavinexazixo.onlinewebshop.net/a_single_shard_quotes.pdfIn PDF document text
- https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_bea56e6706e947abb17d54701027fe5d.pdf?index=trueIn PDF document text
- https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_30fb69547e534910abc02adb6630a69f.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/67e11c05-bff2-460e-afb4-6a9ec8856eaa/limono.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/afa8080b-e4c3-4b25-811d-1f236f30790e/saluronigezazevuno.pdfIn PDF document text
- https://s3.amazonaws.com/setigafat/bifojitofotaxanesezajamep.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_off0000e5b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5B5	5272 bytes
SHA-256: `794a97d0d69d6596ec8c7a3c95750bb133df7418f1db815cb0814995ec789ca9`
`font_01_sfnt_off0000f7bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7BF	11480 bytes
SHA-256: `5058640a7438677217044ddf922a539008c7e94f376976e988418946b35afa93`
`font_02_sfnt_off00011dcd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DCD	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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