Malicious PDF — malware analysis report

Static analysis result for SHA-256 acab29ac9dc38b6e…

MALICIOUS

PDF

78.7 KB Created: 2021-06-26 03:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b588c33f1eaf9493607fb23833e63333 SHA-1: 61f5c8d719d12ffafcc95c865876ae4b07aef759 SHA-256: acab29ac9dc38b6ef35dbfef82f118fa36a00b8bd69c805b13fae7378456c1a9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by an ML classifier. It contains numerous embedded URLs that form a link farm, with many pointing to compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, suggesting an attempt to obscure the true destination or evade detection. The presence of external URIs and link farms points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 5

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://wastran.ru/uplcv?utm_term=project+5+third+edition+student%27s+book+pdf PDF link annotation
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/71e88b52dc4c09955ebcff044d479281/muxuboraxipipopaga.pdfIn PDF document text
    • https://nadamasristorante.it/file/43609832894.pdfIn PDF document text
    • http://dichvutheapec.com/upload/FCK/file/71917486644.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/9e7f09c9ae577ae4894e26796d23411b/punajaparesixojufugene.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/pafukureto.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075197b3930b---kewapolepivupurazoxexufa.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b173f1372f---pipamugirevojazanavuj.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/7830965769.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/128cda9b396fc6b9e0e61cb898b84da6/wutanefinipuxabizi.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c45f8a04aad---lepikonomujozubivolo.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160722dbe2f364---75335131123.pdfIn PDF document text
    • https://paperland.bg/uploads/file/43893369290.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/sazugexidugaxod.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/ba887478a6f44d3155574a76499d3e73/73726023136.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/63843972802.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/luvonuverok.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff1b4ee50b---lijurijaxevitumomag.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/2jsdpt1dullb76o613btgkb7tc/25141700620.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/97267837239.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873d674e2a0---rovibojatezonezumunuzo.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210527230501.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/5db271cbed0b13c52df8db55cb31960e/65467088120.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/dac64d7ee5c96b016faca528a3e79a15/ruzewagoreva.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2B 11140 bytes
SHA-256: 6b55df5c324144c8eee713c2c79390c4e15fce552622185bd5772e07c3daa864
font_01_sfnt_off0000e6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F5 18788 bytes
SHA-256: 19aa9743575c166a418278501df7ae0817fe0af684fa33bb70c215a04cd47c36
font_02_sfnt_off00011533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11533 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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