Malicious PDF — malware analysis report

Static analysis result for SHA-256 26967b9cc00b9b4e…

MALICIOUS

PDF

111.2 KB Created: 2021-06-23 01:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 297f7d119ddf0bbce193a5c9aa5c956f SHA-1: 264c3c52c13ce09ef37a5b126d776a925debb71a SHA-256: 26967b9cc00b9b4ef19ae853917dcc2a872d87e2dc7d76c7c3c53429dd3418ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://synerhu.ru/uplcv?utm_term=raghavendra+swamy+ashtothram+in+telugu PDF link annotation
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/191f4f4db2df89a03c65c94ef0c006aa/legefowaz.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/pilatosafesa.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609841421bfef---rosajimuxuvubamalij.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/e094d2355cfc2ecd04a1ebb34781e684/93755727562.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/6bfcf9f80b04dba224955d231a453597/71147808225.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/1796121299.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d94b20ac6d---ponekon.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/99034630775.pdfIn PDF document text
    • http://africareview.in/userfiles/file/96354664876.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/gifadufiwagamawefekodo.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/resovosikosoraziz.pdfIn PDF document text
    • https://fanaf.comarticle_ressources/file/jafesabuvewixugudolusur.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/c55a09f4389939cea4ab05b1686f60dc/kanenowa.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb48e54b29---jibitovulupeb.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/3ffu1sdihojrohoccbncqtl9b2/8852497234.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/l8kom9ilme1m918hsc1b4s546e/58981605300.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A2 5500 bytes
SHA-256: 49a18407fde2f893c2d1fca130ca5e5b418a9b1b35e7ef6e18a99b630fce9313
font_01_sfnt_off00011b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B47 3740 bytes
SHA-256: eb903a4bcabb0673128613fc2c6a3b3be6b6be0204d11159aa2f590e1d82ee93
font_02_sfnt_off000126be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BE 55480 bytes
SHA-256: 06325a30319649b32f26eeb219a9f0bc4c1b90672eca560e3b8ac61bbbae7cfd
font_03_sfnt_off00018c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C94 10476 bytes
SHA-256: fa5955889c2ed896963c376ff609394ae134bd776983beb33e0e19c1e58922d8