Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d790708186e0743…

MALICIOUS

PDF

79.0 KB Created: 2021-07-07 02:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e540ea80d09a08b9bc16900ef1bbef13 SHA-1: 809868772d5ead59f4b723d8be2a7a0430359f51 SHA-256: 1d790708186e0743d2431f12ba2962f9af222fccd53eba10c47f513501a4b203
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories. These links likely lead to further malicious content or phishing pages, aiming to trick users into downloading malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7832

Heuristics 5

  • 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
  • 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://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/8d3089dc688c8297d24631ab9e42d5ad/32967400472.pdf In PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/fa05061ec49b565683e7eba9ed5848e5/82710293749.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/516c5e73666fd863f50736785ad094e7/42514024535.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/3so8of0bpc9k0gcane6iiii0ta/75371782851.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce8784d02b---8075777053.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/44174674587.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607c676402474---xobewuxulolezuk.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/gixiwoso.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/c8f2ca98666af914f5bece6b3fa9929e/wixurosexodepaxedotilutag.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160977e86dd26b---bedusirujuvizi.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d96dbdf6ca---19206214780.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/56443384760.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca3a367ff7d---tutinogapituk.pdfIn PDF document text
    • http://stevis.cz/files/file/75455890005.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/eb064d15929f4d9dc63b1c38857913d3/61472598417.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/xubajol.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b131f86e474---boximikupavexororo.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3de7fdc1f4---53602192092.pdfIn PDF document text
    • http://armanetti.com/images/voburetaginuvevavizokasav.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/22027889907.pdfIn PDF document text
    • https://ratsimae.eemedia/contents/file/97228074263.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/652e3ca074de96d21acb085ed006e9b1/dirasebedibufoputunu.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/i8iqq37khedkgk5djggj02ldf6/11609765720.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/lazomenegufolanivi.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/77553904276.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=jquery+find+selectorPDF link annotation
    • 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_off0000cb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2E 16732 bytes
SHA-256: ee434c82ab719c0f6950212795b4cb72df23a38483750ea9d814cffe32dfbef6
font_01_sfnt_off0000f6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE3 10656 bytes
SHA-256: 7cd01e62759b120494392c3d5c3e1430a786ca968f7b8718fb8817537c96b824