Malicious PDF — malware analysis report

Static analysis result for SHA-256 5965b02a29a44e30…

MALICIOUS

PDF

77.8 KB Created: 2021-09-08 01:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 96292a574e2d1817cbedb156a1eaa3df SHA-1: bf39ea78ef52ba6807796899ee4d44f06101941b SHA-256: 5965b02a29a44e309789d88bbfbcae693ad5b5e90ee3842c55b8b56d9fa5ac00
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised websites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or malware distribution vehicle. No scripts were extracted, but the structure and URL patterns are indicative of a malicious intent to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://garglob.ru/uplcv?utm_term=10+class+math+solution+book+pdf PDF link annotation
    • http://rghsalumni.com/clients/82979/File/49760119879.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/24539991769.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/aa72f9b8586341b4a762e9dc2bd2eef7/meweteserigajavi.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073d34102a48---72219115094.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/96053155212.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021050900080930.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/korowofezi.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb9267eda9---fesukidajowone.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/18813308788.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/74f609e49a662eaa77eeb091be5c8d48/97811343237.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210601_034300.pdfIn PDF document text
    • https://ecole-anglais.com/upload/files/likaxigotizusutagaxi.pdfIn PDF document text
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/mamowizejitusovowe.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/69691249228.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/nuvufolirozezedebaruje.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/nowobobutefixufufezapedu.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/tspspccfjad7gdvqasreb9cfu7/77659190414.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/kaposidizasix.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/bopudeporu.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/mixilosuburibiruwufotezu.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc233983db---tuxubakapizilijexetagab.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/33963638400.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/217fe986b5a842f7e5012468f2f64c3e/kudidudoje.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/mururinetitokanokin.pdfIn PDF document text
    • http://headrepublic.pl/images/files/kunufokapowugakipugoxuju.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_off0000ca90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA90 17512 bytes
SHA-256: 2f597f749d4f7fbf58e770b417af6c5e4ff71d47dcd0f655eb0ffece15446de1
font_01_sfnt_off0000f7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE6 11064 bytes
SHA-256: 6033c6c0392ef15ec7ad03432a82855ff6c8d322217138026d3bea3143b49b13