Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9646e982039965c…

MALICIOUS

PDF

72.7 KB Created: 2021-09-24 04:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d420995091cc500c011b67d6ba6d2cbf SHA-1: 606fa860e6275596b4e08a46a7ba6e04a0f90638 SHA-256: e9646e982039965c2e16bec165c2a7488a6f7bb50d31d889a9b68d6a60f0592c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to an IP address, indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pistant.ru/uplcv?utm_term=pokemon+diamond+and+pearl+gba+rom PDF link annotation
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/20418536227.pdfIn PDF document text
    • https://karlschool.org/uploads/files/202109160103255100.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161422db48f1ca---5371904995.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/2957134486.pdfIn PDF document text
    • http://www.me.ntou.edu.tw/ckfinder/userfiles/files/20210904_064421.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d09ee6dbd8---97260141585.pdfIn PDF document text
    • https://mavibusiness.it/file/57248961746.pdfIn PDF document text
    • http://aven.su/userfiles/file/runitajarukogoxam.pdfIn PDF document text
    • http://safires.cz/ckfinder/userfiles/files/45720606786.pdfIn PDF document text
    • http://lianbang123.com/uploads/files/202109021403443055.pdfIn PDF document text
    • http://gjbbang.com/userData/board/file/4560720.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/82602088495.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name/files/bujeri.pdfIn PDF document text
    • http://budgettranslation.hu/sites/default/files/file/93618818473.pdfIn PDF document text
    • https://www.auto-ecole-acm.com/ckfinder/userfiles/files/dovujadetirudujufolid.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/zevotugabokodibun.pdfIn PDF document text
    • http://rfinshaat.az/userfiles/file/54731091788.pdfIn PDF document text
    • https://skopjemuzikon.pmgrecordings.com/ckfinder/userfiles/files/bevikobuburaraxunew.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1614d136231a16---46064905745.pdfPDF link annotation
    • https://gad-elhak.com/userfiles/file/sukunuvavowabezivakadom.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/44414458836.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/tidixe.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/mokafapewe.pdfIn PDF document text
    • http://minhanh.com/files/23479357051.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/56318670782.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/wisesufamepifo.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_off0000bacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBACF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E6 10704 bytes
SHA-256: cba6a646bcdafb10510b42478edef6ff301acd61bd7335df05bbbcf3c1340b42
font_02_sfnt_off0000eae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE8 16552 bytes
SHA-256: 2eeb5abe6d2daaa3e824c93f3d5f0568f19620732d427163d2a0d20d97eda57e