Malicious PDF — malware analysis report

Static analysis result for SHA-256 996642b99fd4cf19…

MALICIOUS

PDF

84.3 KB Created: 2021-09-08 02:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d55ad3edf6b88c44acc4bc82c914a835 SHA-1: f986c449419199e32f77f38a67109b3c76ef7d92 SHA-256: 996642b99fd4cf19707126296e874ad3e74ec44b4dba57722a10ac709d4940d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for malicious content. The presence of numerous distinct hosts and the use of formcraft plugin uploads suggest an attempt to obscure the true origin and purpose of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c9b802b91---85219174800.pdf In PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/5915bcffdb64ca6ed0dc03dd10c9d506/38307974122.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/4c9lo17bseomto0236hfb56tl7/wadoxejowumuparubejozuzok.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/82961948659.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/3dd0e53eb44cbf3a3b08f432d66f8feb/nanelafesadikaxesisavawa.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/nonak.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/mivefekep.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/fj0b42rl3hfqaqmvclpt8rbdhl/fonalodowopavejirizataje.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/33773597855.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/4ee5280df9a04ec321579d1192c188db/47624054602.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/eb901ee81f3cbc12bd07457e0da3f289/98109555994.pdfIn PDF document text
    • http://elard-group.com/ckfinder/userfiles/files/19575696102.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/ripizomivubitevakasapavor.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/lofuwolorukoremikuki.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ff0de3b1926---73588114863.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c406731dcb4---libosabid.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/99808fc0632771db6a007f7c932155de/83303454978.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/fozagol.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/f1fe71a2e1d411932d3a1008107ff69f/28322397552.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/50970457558.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/pifajiwajeloziraro.pdfIn PDF document text
    • http://aifamilyreunion.com/clients/59202/File/xufikufemepo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=rccg+sunday+school+manual+25+november+2018PDF 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_off0000daae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAE 20352 bytes
SHA-256: 5e78c7c3cfd4af2e7c459f7bff2709f4b61cfa24740801f803bbb6596aaed138
font_01_sfnt_off00010ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF1 11728 bytes
SHA-256: a5f81a2d126566c3de2c35e1797d97e2fb76bd1d713d1b51419b4052505300c1
font_02_sfnt_off00012bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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