Malicious PDF — malware analysis report

Static analysis result for SHA-256 449a6c361b750ed0…

MALICIOUS

PDF

79.3 KB Created: 2021-09-04 09:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 45168a0612ede6fecc37b3706e02bf6a SHA-1: 1ea927b640b89daa92d4b6a04420d33b03b076f2 SHA-256: 449a6c361b750ed0f42aff04919d43c75e63e19e4de592f8cf8b69ed0c91b83d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous external URLs. Several of these URLs point to compromised CMS upload directories or disposable hosting, increasing the likelihood of phishing or malware delivery. The presence of many distinct hosts and links suggests an attempt to distribute malicious content widely.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://brenno-tojestto.pl/userfiles/file/39443304568.pdf In PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a111c05fcc7---moren.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/lazutu.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/f7d508d21bcf7be090a6f1fddebf6a27/55706625686.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16076b6066046b---lowonidezimanibumijebe.pdfIn PDF document text
    • http://kubablimel.pl/Image/files/patofikovikut.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/pexetilidenalofexurimazuf.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/ba591287318d177b6df6d0867c119566/tovini.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf822c7437---gofizowexigoxo.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/zubopemokazeg.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/dejepedovasesipaduz.pdfIn PDF document text
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/dowadafazomajeb.pdfIn PDF document text
    • https://gogift-it.com/userfiles/files/nodoziwebavolesufowanerot.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/4c06b49d0a485726cfee8e9a4f7b4997/24758790109.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/jabedeji.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/tulelokededon.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/11358256719.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c175697e746---86204611377.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/99496798799.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/4a633dcb7569ca24677115ccd38450b6/zomuturejidagejaridufogu.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caf6529635---73407761458.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=atoms+elements+compounds+worksheets+ks3PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD003 17972 bytes
SHA-256: bdd71d371d9cb7707bf96dd0f5da7e3387f3822bbca75f37116467c460a86df9
font_01_sfnt_off0000fed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED2 10956 bytes
SHA-256: c6d36128a453758d4059598f471f8884b9e340e54b27fc27787af8a2f794c227
font_02_sfnt_off0001182b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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