Malicious PDF — malware analysis report

Static analysis result for SHA-256 cccea823686562fd…

MALICIOUS

PDF

80.1 KB Created: 2021-09-18 12:35:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: c46d0112667fd3ca6615b35161d1183d SHA-1: bbc1c95a7f6a6b5a3e1a38671d0d0e5c557c20d1 SHA-256: cccea823686562fd021002122d7cffcd10bd5472aae8e731e63fbede2c6ccb5d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://archism.ru/uplcv?utm_term=how+to+find+velocity+with+kinetic+energy PDF link annotation
    • http://musclecar-taps.com/js/upload/files/78296884665.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/dojipatikosobawimuni.pdfIn PDF document text
    • http://tw-echen.com/uploads/files/202109020329487492.pdfIn PDF document text
    • http://ilink.pl/userfiles/file/8032071553.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/161457fd824c99---zefilexujojufudenaxakefon.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/7691889777.pdfIn PDF document text
    • http://www.mousumibanerjee.com/fckimages/file/98724883091.pdfIn PDF document text
    • https://tinhhoaxanh.vn/userfiles/file/63119793286.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/xojetoxavenazizuxuguda.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/9748546165.pdfIn PDF document text
    • http://epodhajska.eu/UserFiles/File/76737278633.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/ce861e23dcd984fcf7b670e5aedc3d2e/22258535667.pdfIn PDF document text
    • http://alatasfilms.gr/ILC/img/file/sofumotexum.pdfIn PDF document text
    • http://hwayoung.kr/upfile/files/ziketa.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/c2892dd311bad31d2d7d304caf5ede75/55316597891.pdfIn PDF document text
    • https://superchills.com/userfiles/file/vujesamoverafepim.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/zuwotipupatuner.pdfIn PDF document text
    • http://olech-rzeszow.pl/userfiles/file/xomixogivaraso.pdfIn PDF document text
    • https://arkadas.yuzuktr.com/eskortarama.com/resimler/file/41284022025.pdfIn PDF document text
    • https://www.colegiodomus.com.br/js/ckfinder/userfiles/files/36379926229.pdfIn PDF document text
    • http://didongsinhvien.com/upload/files/63232860633.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/36944058160.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/munomudukijowu.pdfIn PDF document text
    • http://rentaruedas.com/files/others/wumafujideka.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_off0000d449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD449 17808 bytes
SHA-256: 6952470e155368a376cb0d13fe2cf192bb1cb522debbdb141542300138b8c5f6
font_01_sfnt_off00010243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10243 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5A 10772 bytes
SHA-256: 3a2078d8de41fd831e702444ae0dc068c2bdbb9039e74041563d38c81961bbb9