Malicious PDF — malware analysis report

Static analysis result for SHA-256 9380a1fa318aa8de…

MALICIOUS

PDF

99.8 KB Created: 2021-07-07 02:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9a26db5b532cbf8abf5e53a9d9da7d32 SHA-1: aec525a51917a6679ca6ccac58090262a6ce047f SHA-256: 9380a1fa318aa8dedfb3e30820efd28c05c866bc81f6f013a955566258799039
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites that host additional PDF files. This pattern suggests an attempt to distribute malicious content or conduct phishing operations by chaining multiple compromised resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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://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://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 4

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
font_03_sfnt_off00012738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12738 33376 bytes
SHA-256: 73ddd007300fa1ee214c3bd4f197abb1fdfe299c79f1061d121c7c4576c2fc54