Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff12a44f206ddfae…

MALICIOUS

PDF

70.3 KB Created: 2021-09-27 08:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ae322df71166f08eb4251efed63b9671 SHA-1: 371437bd920b23e6b7dc93f581ff565ee8f20e1f SHA-256: ff12a44f206ddfae4b24d86fe42af5690e6303f7581899a2e2a00fcaf1ecd846
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and multiple external links, some pointing to compromised websites. The presence of PDF_JS and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics, along with the ML classifier and ClamAV detection, strongly indicates malicious intent. The embedded JavaScript likely facilitates the execution of malicious code or redirects the user to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://electronicaindex.nl/images/uploads/rowagafedo.pdf In PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/fagom.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/54ij2n4u38rtl3ktr0t0qagfek/59886047814.pdfIn PDF document text
    • https://albertoangel.sinecsas.com/ckfinder/userfiles/files/91149747996.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/supokusamuzifojenuxeroli.pdfIn PDF document text
    • https://rcot.org/userfiles/file/pidixapaboduzik.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/vidupitok.pdfIn PDF document text
    • http://captainkillmite.com/uploads/files/202109090125099069.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/nikaleganosa.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/gesuderi.pdfIn PDF document text
    • http://namlinhchivietnam.net/userfiles/image/file/rapabofol.pdfIn PDF document text
    • http://shiny-baby.com/fileimage/file/84792993514.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/60762958638.pdfIn PDF document text
    • http://xn--hh0b97d8is16e.com/userData/board/file/18511098487.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210917_7663C131B3B8576D.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/6134527176.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/aa9455528b8546cfc138052fa3b47d9c/73772536577.pdfIn PDF document text
    • http://khachsanmyngoc.com/upload/files/2004918969.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614c7d3ff245a---35053699308.pdfIn PDF document text
    • https://trieurodata.ro/images/file/numajufejozawi.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/viremater.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139454c2c4be---10814613003.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/12386857529.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=grand+truck+simulator+2+android+1PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC17D 16188 bytes
SHA-256: 800554d3d6320da9c8ab21a3ad3d270f40e7a92360d7538c059d647d952d1d34
font_01_sfnt_off0000d72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72F 19424 bytes
SHA-256: 777a24b6a56599d5f543637425e7b6e1359c7eaffc5fcc84128b27d783859c3d

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