Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea27bc36da8fcf1…

MALICIOUS

PDF

80.8 KB Created: 2021-09-19 17:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d36cd13e9f71f4ca36ef80f029acd0d1 SHA-1: 99247476bf49a1f4a33ff4b1eccca724a5591cd2 SHA-256: 6ea27bc36da8fcf12d2a9f46b26cf48636fc77e28cd8bada8e44516218b1aa7e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a link farm pointing to multiple compromised websites, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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
  • 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://radyoislam.com/resimler/files/fetota.pdf In PDF document text
    • https://rajakeempat.com/contents/files/20567710932.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/25349623252.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/23515068226.pdfIn PDF document text
    • http://nguyenphat.com/public/default/ckeditor/files/68888992080.pdfIn PDF document text
    • https://cecprint.com/images/file/litemavabopuwafutawokuj.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c72f2b8d9---33172289117.pdfIn PDF document text
    • http://oembag.com/uploads/files/202109040350365883.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/rejokojufotuxe.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613f057d99b18---7693169178.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/pikudegojerotelifidasalo.pdfIn PDF document text
    • http://vuonlan.vn/data/upload/files/vazakul.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/71609066937.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/36611925362.pdfIn PDF document text
    • https://bakwanudang.com/contents/files/javusepuvax.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/13267529033.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135fd69584cb---64120249409.pdfIn PDF document text
    • http://hzxgdz.com/images/upload/File/lelijarojofa.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16142344f6d1c5---97964303037.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/kulutanamesepubapowiz.pdfIn PDF document text
    • https://pierreseche.fr/userfiles/file/kerolumoguvelofasisivuxi.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/61143540335.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/wiwupodezore.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/88ca13bc2ebe10cdd65dacea80be06af/vexetep.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7b8a112bb---11240816776.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xukojitimomelopojafuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=waze+gps+apk+downloadPDF 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_off0000d6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C7 18060 bytes
SHA-256: 512bbca7a99ea602c05fcbb0e47abe555852dba1c84dbdce8f480f1c51c98e70
font_01_sfnt_off0001051b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051B 10508 bytes
SHA-256: 3c5cc610badf0c067da202c65d8eefdcba13f77d8c2ddaa9326c5c346ffda680
font_02_sfnt_off00011d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1