Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2411c6950dd7aa…

MALICIOUS

PDF

83.9 KB Created: 2021-09-18 10:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3a87751e8f7462e2e25bc1a7c21c01b6 SHA-1: 762ccff400b26ad8f02af911d14399c0b084589f SHA-256: ce2411c6950dd7aab679b97df827aa8f367fc504e4d8a20ddf2b37dfa399b8c4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code. Several heuristics indicate the presence of link farms and compromised upload storage, suggesting the PDF is designed to redirect users to malicious sites or download further payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 7

  • 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.
  • 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://sangjeom.com/userfiles/file///92090364599.pdf In PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16140e83274953---suwigeruvevamiwelu.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/vukerewazunosiju.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161382ed521d09---35438739155.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/mokavovo.pdfIn PDF document text
    • http://ieeepes-thailand.org/app/webroot/files/files/46290372346.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/53537258501.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/sibet.pdfIn PDF document text
    • http://gcoekmr.org/cukashmir/User_Files/imagefile/21164342879.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/kinorafavamavusux.pdfIn PDF document text
    • https://kingwrapcarspa.com/upload/files/8091293965.pdfIn PDF document text
    • https://excellencetogether.com/img/files/file/zuxipapo.pdfIn PDF document text
    • https://tutorlookup.com/ckeditor/ckfinder/userfiles/files/duvogotanovapizida.pdfIn PDF document text
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/sejalokup.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/6868122806.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/xogusobada.pdfIn PDF document text
    • http://thicongdiennuocmiennam.com/uploads/files/diwogetaxobi.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388cb478b1d---92870447156.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff54427fb2---54775731741.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///lifekusaf.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/58279634189.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/negur.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///salasujiwebadaj.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210902153804.pdfIn PDF document text
    • http://candientu24h.vn/webroot/img/files/lukoxotur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=aksar+2+2017PDF 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_off0000ddb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB7 20696 bytes
SHA-256: 625cf749fa8397eb9b8f71e92fbe7e50d74f8aa4dedc353306036c40baefb4fb
font_01_sfnt_off000113e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E9 9924 bytes
SHA-256: 53cfb955969802f417b75a5253851e590c9fa513f82ba4570f8b4f5bf52f6642
font_02_sfnt_off00012a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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