Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cb33067cea3b57d…

MALICIOUS

PDF

77.4 KB Created: 2021-03-13 21:53:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 070568791ec1024c6923ff09f68bbe06 SHA-1: 4f192131700b3d930746d891bc8815c92651f153 SHA-256: 2cb33067cea3b57d30bc54fb32d6aff19998bc0841680dd07deacd0dd0681057
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many of which are generated to appear as SEO-friendly content, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/award?keyword=the+snow+child+angela+carter+pdf PDF link annotation
    • https://cdn.sqhk.co/goluxewimabu/ibjeljj/composition_gouvernement_republique_democratique_du_congo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453747/normal_603032a8aabda.pdfIn PDF document text
    • http://zasufigonibat.getenjoyment.net/pdf_burdah_sekumpul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403824/normal_602ea0e935aa9.pdfIn PDF document text
    • https://cdn.sqhk.co/denalivek/hjhVHjW/download_aplikasi_demolition_derby_3_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zufutetuwume/jjOi30R/tamil_amman_bakthi_video_songs_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479462/normal_5fe1c75121fb8.pdfIn PDF document text
    • http://bijepitujutix.sportsontheweb.net/20089277369.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/34213081961.pdfIn PDF document text
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_327d47a0acef43238681764b8e86fe13.pdf?index=trueIn PDF document text
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_b7923863e319420b91937fae3ab1fda9.pdf?index=trueIn PDF document text
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_8d84d2f75eec488bbc57983ec5eb0236.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/24258114687.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/images_from_google_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/tixatovitifoverop.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/adobe_audition_cs6_portable.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/vipetawapilole.pdfIn PDF document text
    • https://69868269-04aa-4a0d-8379-1371762fd556.filesusr.com/ugd/d8beff_9c96f368ba0f4c11878c519ee69bf67c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wemofodi/timeline_of_us_history_1990-present.pdfIn PDF document text
    • https://01477de9-116b-42a6-a62c-54244336611e.filesusr.com/ugd/dea9e9_dafc4ad65577420c84502aaf141716b5.pdf?index=trueIn PDF document text
    • http://gixiluvigatekij.atwebpages.com/61316092690.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8F 5456 bytes
SHA-256: 83dc25568b4e3800eb9a6ae5c301f7c2db0c3c874856382cbb99aadcc8e7d289
font_01_sfnt_off0001002d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002D 11740 bytes
SHA-256: bfdf7e8460e211fe7b17b505b87633b1494f64fcab3c897176d9d2c1daa9062b

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