Malicious PDF — malware analysis report

Static analysis result for SHA-256 a37af3a7a66aec5e…

MALICIOUS

PDF

72.3 KB Created: 2021-10-01 21:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 2dab0a83f29b7b6b8a76364f3a16d3d8 SHA-1: 424732952f926aa183226dfb29bf4d3fd00a4f60 SHA-256: a37af3a7a66aec5e0ffb4412ed9e735c8564058775ef69cdfa5aebe37d9cec5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were extracted, the structure and URL patterns are consistent with a phishing lure or a downloader for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150bdb074390---jexologexakonekaned.pdf In PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/fudidowakirew.pdfIn PDF document text
    • https://nk-sostanj.si/files/file/93431833096.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/zutonepobef.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/2c46907b368c393fec1a5bf4d922a588/rixolisijetugedomuve.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/31293085072.pdfIn PDF document text
    • http://nfc.soo.jp/file/48659960656.pdfIn PDF document text
    • http://hbaoge.com/upload/files/kutixufomulakajem.pdfIn PDF document text
    • http://www.agot.pl/upload/file/viguderelixetos.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16152675e56495---gazodero.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/tuzonizobu.pdfIn PDF document text
    • http://naim.naparts.com/images/fck/file/didobezuxekobazefivi.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/91741917327.pdfIn PDF document text
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/3291425315.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/wudifam.pdfIn PDF document text
    • http://1yunnan.com/ckfinder/userfiles/files/xorevenevodami.pdfIn PDF document text
    • http://artikos.pl/userfiles/file/zosufotupipaf.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/9640ee7737299f636017f27fc1cc00a0/pupami.pdfIn PDF document text
    • https://atvatextile.com/upload/ckfinder/files/35077392798.pdfIn PDF document text
    • http://esistore.lu/userfiles/file/82920383780.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/sulefinikezurup.pdfIn PDF document text
    • https://ww150003.linebot.net/upfile/files/20210909032130.pdfIn PDF document text
    • https://sardiniagreencoast.com/userfiles/file/buwunowelaxirijosifuven.pdfIn PDF document text
    • https://alicantea.centralcms.cloud/galeria/files/59913311715.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/67770730884.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=bach+995+guitar+pdfPDF 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_off0000b36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB36C 10784 bytes
SHA-256: 494b11467e09fbc503a010971b6ed12dcd41402672c6eff96d86d676c2312505
font_01_sfnt_off0000cc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE457 18696 bytes
SHA-256: 6b1cef86007cfa2762bc0c75340ca155295229bdd11a2a9e459062f91e61630a

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