Malicious PDF — malware analysis report

Static analysis result for SHA-256 3463a4e17cf2e103…

MALICIOUS

PDF

88.3 KB Created: 2021-06-27 02:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a3ae7dc17de7afd048dc4f81c4539ca5 SHA-1: 79c8ccedf45373bd6ebac5eebde292b8b4e53b69 SHA-256: 3463a4e17cf2e103fb54beda194b1148e22b624d70db636e0aac358f9c686ded
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous URLs were extracted, many pointing to compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. The PDF structure and embedded links are consistent with a spearphishing attachment designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093e028bd644---32153658090.pdf In PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/vg1gj93ab0qv7ooqejurufkkr5/diliwifovobuze.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16087ad60f28ee---93420962017.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/62109000410.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/st4je27o2n3ean8fuiu723oii6/pirabipozaruxibiz.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729bc47654e---zufux.pdfIn PDF document text
    • http://tele-video.ru/upload/files/38906395605.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/36601612658.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/doxape.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/5950587247.pdfIn PDF document text
    • http://chukgoobok.com/files/fckeditor/file/75302038923.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c76ff905103---78948861187.pdfIn PDF document text
    • https://beaszemin.com/files/tisilaf.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/9egso6qo665pmg155rpr149941/37891293786.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/q433v0vhbu60f63r5knspurbl9/magepunimobawi.pdfIn PDF document text
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/21055484123.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/manusaxiweloba.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/77445863363.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/69d6c1f128be4ff59e89eb2212f1defc/bevakixusadiguwonun.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/fl3lvg7j72i23f4sfr67ok4ad8/58128027396.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c65a3b0c8---61372676794.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/73035544300.pdfIn PDF document text
    • http://lblussana.it/images/file/vixitoponunedojirokona.pdfIn PDF document text
    • http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/detofekupomijitopoji.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/nafokelijikizuber.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/94139469158.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=maria+le+maria+songs+mp3+free+downloadPDF link annotation
    • 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_off0000f52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52E 10996 bytes
SHA-256: 45961271d2cb2c1a0e41726877faa58510242c3b67e91e45f9bec25ce4da0b5e
font_01_sfnt_off00010e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A1 17096 bytes
SHA-256: 16defe116230d4b320283d0349af67e3e9d8041303b45c50d0d74fd777c18074

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