Malicious PDF — malware analysis report

Static analysis result for SHA-256 a20273995f2d606f…

MALICIOUS

PDF

83.3 KB Created: 2021-09-19 01:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e8526e1201615a6b1d67e7ed930786ca SHA-1: 624d8c0471d17bc71d5876b2ce0f858ad41d76b0 SHA-256: a20273995f2d606f672b917574c712752f8846c523085aecc540dbb55c8894b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to various PDF files, some hosted on compromised WordPress sites, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://larrialdiak.es/files/galeria/files/57160571095.pdf In PDF document text
    • http://ztkammer.at/uploads/file/76897589184.pdfIn PDF document text
    • http://dsfly.com/uploads/files/52220204794.pdfIn PDF document text
    • https://adproissy.emailingmanager.com/uploads/editor/file/53273754581.pdfIn PDF document text
    • http://leicesterbiketec.com/userfiles/file/gidiwofuvawipomezulepuvex.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/durajulutanugew.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613d59151c592---walupafufeziresobipum.pdfIn PDF document text
    • https://giltmorestukko.hu/ckfinder/userfiles/files/2071276078.pdfIn PDF document text
    • https://jager-ig.tw/up_photo/file/98661677000.pdfIn PDF document text
    • https://profm.hu/files/file/jupoderezi.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16134ca5e05c7a---20224566206.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613059d006ce1---sezataluzorevaf.pdfIn PDF document text
    • https://flour.co.uk/ckfinder/userfiles/files/66048602113.pdfIn PDF document text
    • https://techlan.pl/files/file/89013772937.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/s28kdivc4r6qicnvaueh5b8jtl/famajixaxaxototomifub.pdfIn PDF document text
    • https://badrivishal.com/media/rikemebuxenevu.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/42378252209.pdfIn PDF document text
    • http://topspeed4wd.com/ckfinder/userfiles/files/66757391447.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210903230208_kpf62l.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16146611f68ab3---3380121962.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es/ckfinder/userfiles/files/lugadewaweronozudanewov.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/87557974635.pdfIn PDF document text
    • http://otohondamientay.com/upload/files/63763305634.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/72843210604.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=good+hand+game+download+for+androidPDF 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_off0000df24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73B 10660 bytes
SHA-256: 29deef7fded3904ca91eee767592d05622aaedae6e9a0a26fa356bed36abad7c
font_02_sfnt_off00010f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F40 18368 bytes
SHA-256: e1d31dec0b3b8d62678045bd4295f222db6f2083e7870445c4a767a5bd337fdf

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