Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e20bf655ee6e52e…

MALICIOUS

PDF

78.2 KB Created: 2021-08-19 21:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 84ec3093e6367ad3c34457d3f5d9fb5e SHA-1: d41d6ea57b4a9a8a9db4378636d750f99856cb90 SHA-256: 1e20bf655ee6e52ed91d3bb72529cf05d553fc19e23027f78c479bda43053c46
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document's content is designed to trick users into installing malicious browser extensions or updates. Numerous external URLs were found, many pointing to compromised WordPress sites, likely serving as part of a phishing or malware distribution infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://chcial.ru/uplcv?utm_term=bill+nye+climate+worksheet+pdf PDF link annotation
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/9mlkdjdn8h22dc0grkc9ql1om5/66594270873.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/xivajekuxonovasasiva.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/75216ff3bfb7adecd03fc90e2e2f8432/nalokegozigukeloteduzenu.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/99801971006.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/4274194391.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/m3kla7i3hpb9d6cp4nrf5nb0cs/78161182787.pdfIn PDF document text
    • http://prattsofdouds.com/clients/d/d8/d85aab9f4bcbae69c8358f7a9990a0b1/File/47583401560.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d862ed5227---22196932665.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/32f5515770c9dbe80f9fd7a3a966f824/97726772381.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/3477a5d686a52eee93e37dd9ef0ed400/zefid.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/bb35ff5eb03275352195a507748eaea8/zuwiginalejoxazofaj.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/41988858380.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/93074896270.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/37bbf4f82efb4d8a3471ac954bc87310/77401358413.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/b7hhisv45hv37bcuiie7t2jpa1/dipokazotikobasofomil.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/59b6e9cdcad59e2c25ed0f013145edb2/rimejabu.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3731529517---tosonijopupowagiva.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/31028131884.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/5121690243.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16108fb06c268b---59347552245.pdfIn PDF document text
    • http://rapet.hu/files/bowozisudekudijegurademan.pdfIn PDF document text
    • http://climtech.com/files/files/boridanavotusupi.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/81457258164.pdfIn PDF document text
    • 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_off0000cc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42F 16764 bytes
SHA-256: b526849e690dc4b13ddae75aa9ca808a0c7f5efc9d649ffc659d6a1af9f057dc
font_02_sfnt_off00010f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9E 11228 bytes
SHA-256: 80068ffb9ef1f08b0676c9c1d84122b83953e27e9a23adb60721b75b8ee8e884

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