Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf7b91a30d0480a9…

MALICIOUS

PDF

68.9 KB Created: 2021-03-10 01:03:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 02c0122304226da6e2214a18c86a3d80 SHA-1: 86540be36aaa8c32d479be6f530a7f7ed93d7f39 SHA-256: bf7b91a30d0480a934305468e9ab6d15a5266c7fcfd657ae15cd1477aff355f0
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, many pointing to disposable domains, suggesting a link farm or distribution point for malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to obscure the true malicious intent by creating a large number of links on low-reputation domains. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://maypoin.ru/wix?keyword=cape+biology+unit+1+study+guide+pdf PDF link annotation
    • http://maddot.space/sifemofosafurfrbw0.pdfIn PDF document text
    • http://jobs-ingenieur.best/dibujo_de_rostros_facilesjceun.pdfIn PDF document text
    • https://pufukowog.weebly.com/uploads/1/3/4/5/134583281/fowutez_loresefigipe_lometiboti_panogelixedeg.pdfIn PDF document text
    • https://pijolonaponezu.weebly.com/uploads/1/3/4/8/134879261/fuwunowovaduguse.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/winuxi.pdfIn PDF document text
    • https://vuvudarekiw.weebly.com/uploads/1/3/4/0/134017261/gixivagobuloba.pdfIn PDF document text
    • http://wusazododapir.iblogger.org/tepizedamedar.pdfIn PDF document text
    • http://bogavevi.22web.org/aiyyaa_mp4_songs_free.pdfIn PDF document text
    • https://waxopudiva.weebly.com/uploads/1/3/4/6/134695928/3b63a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481409/normal_5fe6410f437ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403816/normal_603f82d37012c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_5fd97362939c8.pdfIn PDF document text
    • http://liko-sneakers.com/food_safety_auditor_salaryv593g.pdfIn PDF document text
    • http://tisurejafin.22web.org/8153693909.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/lokodomedoguke.pdfIn PDF document text
    • https://0ccb9a81-bd3c-41bd-bc79-2352350f0e5e.filesusr.com/ugd/95ea6b_88a8063235974089818d07a86b514ccf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/nubedoma.pdfIn PDF document text
    • http://sofidubanelen.epizy.com/tata_sky_tablet_app_apk.pdfIn PDF document text
    • http://warunegiluj.rf.gd/apprendre_l_anglais_facilement_et_gratuitement.pdfIn PDF document text
    • https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_0167088e74c74ec8bfcfe199cedc3f8f.pdf?index=trueIn PDF document text
    • https://c809e8a6-5bdf-489d-8d8c-df4e4638a115.filesusr.com/ugd/45a296_4e1dae72cda049a78280074da87359cd.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD082 5312 bytes
SHA-256: 281916bc27468ee60e0d5006444a89333abca9cbc09b5decbd7fb9cb18597245
font_01_sfnt_off0000e2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AE 10408 bytes
SHA-256: ec8831aa6416459b3f738960b98ab7da6fc7027e7035fd84151b555d14c285bb

Open this report in the interactive analyzer, or submit your own file for analysis.