Malicious PDF — malware analysis report

Static analysis result for SHA-256 291d18c203f5a764…

MALICIOUS

PDF

83.1 KB Created: 2021-03-21 08:40:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 559ca794cd696f7300ac76ee20379ddb SHA-1: 28d5d8fef6c00a3031647cd61f5e231d87fb3fc7 SHA-256: 291d18c203f5a7649203701dc17a505683feb5ce1e702add14e736895e2ddc75
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged as a 'PDF_SEO_LINK_FARM', suggesting an attempt to drive traffic to malicious or spam websites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing or a trojan. While no scripts were directly extracted, the PDF structure and embedded URIs point towards a phishing or link-farming attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/123?utm_term=reforma+anglicana+definicion
    • https://karifizamazo.weebly.com/uploads/1/3/1/3/131383674/gebuv.pdf
    • https://bibonuben.weebly.com/uploads/1/3/4/5/134576194/walejadarugesabax.pdf
    • https://cdn.sqhk.co/kekotenonaxu/jjhbxPg/dasakujebakepefikifuz.pdf
    • https://cdn.sqhk.co/mezewimaxus/Eidjjhg/80476584671.pdf
    • https://vebilikowuti.weebly.com/uploads/1/3/2/7/132740371/9496052.pdf
    • https://cdn.sqhk.co/letaziseb/aie0aif/soccer_star_2019_top_league_apk.pdf
    • https://cdn.sqhk.co/nigigeje/eLjdZhe/33985751892.pdf
    • https://cdn.sqhk.co/bamebuxi/AhiKRvG/ski_safari_unblocked_games_77.pdf
    • http://es.wikipedia.or
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_a43d6b23aa2e4d0e8d9007f10618f83d.pdf?index=true
    • https://s3.amazonaws.com/womirofop/high_school_biology_textbook_free.pdf
    • https://f4e740b0-69d0-4d5c-a0c7-362dc6b2ad6d.filesusr.com/ugd/0356fc_b429d012a1aa4472918bbb42fcfd95e4.pdf?index=true
    • http://muvekalufisu.atwebpages.com/53086968735.pdf
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_f224814911844a8b8bf99b450e7055c4.pdf?index=true
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_1c0f64fdd59e4a9492e9e7060c7a2c9f.pdf?index=true
    • http://redifigikutusoj.myartsonline.com/47033127865.pdf
    • https://s3.amazonaws.com/bopuxosavubare/appsense_application_personalization_templates.pdf
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_3dab1bb228924bad8423a12abf22eb4c.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f959.bin
37c761695ffffa6ef282699c35d810071147c16e9b9d37b519d69dec0f5783c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF959 4876 bytes
font_01_sfnt_off000109cb.bin
ad293c97733b473494b549defa2ae454926b46fe7db6b6b37a8f4aa8439f7bda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109CB 11848 bytes
font_02_sfnt_off00012fa7.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA7 4324 bytes

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