Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4a090bbd3dbef6…

MALICIOUS

PDF

94.1 KB Created: 2021-09-05 04:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e79f3d22d8473a39c15c0a6e2dd966d7 SHA-1: 4253825a2045c1567ae12f1d6995a5ea1f429113 SHA-256: fa4a090bbd3dbef696bea63efc6da000f50a80a2952778ab7f748e7d7c0acf8b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9965

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://garglob.ru/uplcv?utm_term=the+dialogue+of+plato+pdf PDF link annotation
    • http://guoyangmoju.com/userfiles/files/82351394872.pdfIn PDF document text
    • http://dream-mebel.com/pic/file/70121551540.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/93685aa244df448d1bda1d1fe4e502ab/dopoteromubud.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/75f226e7c683ea840d61d7e80e6b753c/73910147970.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/f085a41173e91eec95dc6d599600499d/48521362756.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/18035853447.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/mts6r826qha4lnhi2sh1eomtru/78214853401.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/muruwozafibinetemul.pdfIn PDF document text
    • http://kag.fr/userfiles/file/benanufibawokufobafudaveg.pdfIn PDF document text
    • http://conganbacgiang.vn/app/webroot/uploads/files/15688175218.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/tonawidafel.pdfIn PDF document text
    • http://sprinter-lab.ru/content/File/febowovibefosulef.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/3f9b0917b9a9b7dafac9a1e3f3883564/24467826075.pdfIn PDF document text
    • https://samowar.ch/upload/file/zisiwelodo.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/a5706759f83518a1a70e59e5a42cd16f/80318226996.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/p49v925fh3e8megjb8vkq4s2ft/wokurifanexixuxu.pdfIn PDF document text
    • http://ca1970.com/clients/10044/File/futaxe.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/65595451101.pdfIn PDF document text
    • https://invest.pl/userfiles/file/futubatetivuv.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d530f0d069---82515929736.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/ditikitezetifesadewed.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/xatezonulosirexozaj.pdfIn PDF document text
    • http://www.iciparis.ru/ckfinder/userfiles/files/73188821774.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/zevibuf.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_off0001050d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050D 19940 bytes
SHA-256: 10f20281cfb0c63bd3e7d0a00f2ebd1b807d317956872937c69f8120c3a1a02c
font_01_sfnt_off0001395d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1395D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15174 10468 bytes
SHA-256: 83acd198f44a437b85b9f0b2fc3e70feec007d78fcbac582c2d7a11477b6ff89

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