Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3618ba080359e4…

MALICIOUS

PDF

75.5 KB Created: 2021-02-28 06:33:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fe305cd43635c46530fe8c7de17858b4 SHA-1: f7c9d1b3885b02f82b9c830f3ce0b0af4a5a6834 SHA-256: 2b3618ba080359e4435cf42a7728f4d45ed3f37e968328662a63df29e58a1143
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/strik?utm_term=robin+hood+2010+full+movie+in+hindi+download PDF link annotation
    • https://bobazuforabi.weebly.com/uploads/1/3/1/4/131452976/3585999.pdfIn PDF document text
    • http://organic-ita.space/2189923095386aow.pdfIn PDF document text
    • http://dazinifuxevoji.22web.org/dice_masters_dd_tomb_of_annihilation.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/fundamental_analysis_course_indiaq2gl1.pdfIn PDF document text
    • http://fringigejy.site/842946267051dcsp.pdfIn PDF document text
    • https://letazofuwukuge.weebly.com/uploads/1/3/4/8/134869061/xexogusafiru.pdfIn PDF document text
    • https://kurepisafigovu.weebly.com/uploads/1/3/1/3/131398088/2071514.pdfIn PDF document text
    • https://resafuki.weebly.com/uploads/1/3/1/3/131398359/5613398.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/luropiw/fidoxozibe.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/bad_blood_series.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/84448586526.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/best_board_game_expansion.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/69990371570.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/pioneer_avh-x1600dvd_how_to_connect_bluetooth.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/moto_g7_play_user_guide.pdfIn PDF document text
    • http://nujowizuwumug.rf.gd/mark_sheet_bsc_2015_rmlau.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/apache_helicopter_game.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/guidewire_accelerator_marketplace.pdfIn PDF document text
    • http://bopunuzas.rf.gd/critical_discourse_analysis_van_dijk.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_off0000e84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84F 5500 bytes
SHA-256: f211db9d43d77344361863c6a3fad05b5cf877db7f8ae9df6541afa15c26ab49
font_01_sfnt_off0000fafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFC 11008 bytes
SHA-256: f73a1f7d4c9325a3af2067615e461d29033869e09e40d2ac2f11d9722f8bdac4

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