Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da2836080671b4d…

MALICIOUS

PDF

97.5 KB Created: 2021-03-22 20:14:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d3f179db6b3bec838370b1c23f6a6d1b SHA-1: ee4ec1129d83ca8dc8e7ca1013abffaecad0338c SHA-256: 5da2836080671b4d95ed7ecd35fe266446f9a491252b3e0d4a1c355e9d87b36a
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://xajibur.ru/123?utm_term=direct+object+pronouns+chapitre+2+answers PDF link annotation
    • http://worameruvejaka.mywebcommunity.org/how_to_use_dynamite_prophet_sport_lipo_charger.pdfIn PDF document text
    • http://sivelural.mygamesonline.org/arbitration_act_no._11_of_1995_sinhala.pdfIn PDF document text
    • http://vizilirudigub.getenjoyment.net/kaxilu.pdfIn PDF document text
    • http://wegoluxetas.scienceontheweb.net/ap_biology_biotechnology_test.pdfIn PDF document text
    • http://larokamexi.sportsontheweb.net/vipusuxadeg.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/wisuw/kagijiniretikigemomug.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/new_company_introduction_email_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/79211458862.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/32520459191.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/arial_bold_opentype_truetype_font_free.pdfIn PDF document text
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_10523ed21c4d489798eb485a582a6ae2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/39517108708.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/46356784291.pdfIn PDF document text
    • https://2c0370cf-43ec-4dc9-8589-ec1e7793a70d.filesusr.com/ugd/404058_e1f919502c74445d839754ff81392df1.pdf?index=trueIn PDF document text
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_fb59277ad9234a118b2c7354f63e88d5.pdf?index=trueIn PDF document text
    • http://kulebosux.myartsonline.com/zojumesojizukofib.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/kotawisifazunidizodaz.pdfIn PDF document text
    • https://3491c55f-27e3-40bb-839b-e55f5d2a6f06.filesusr.com/ugd/d14465_fc5a954db518434eaba32d64b969dac9.pdf?index=trueIn PDF document text
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_8497c7244dcd4d41b42d50d468513dd5.pdf?index=trueIn PDF document text
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_6c0d1fb1728844d7aa36d108c0b19083.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/best_ccrn_review_app.pdfIn PDF document text
    • https://5902ff30-e651-486c-ac37-3e8383bfa78f.filesusr.com/ugd/f35da0_dfd78c35669846caafdf4631f293bddc.pdf?index=trueIn PDF document text
    • http://xufolat.atwebpages.com/english_beginner_booklet.pdfIn PDF document text
    • http://pimobepetokonud.myartsonline.com/2705556627.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B1D 3764 bytes
SHA-256: acc600a45232dbfefa1bde701f16e505be8ce877e118dccee34a8d3672954e0b
font_01_sfnt_off0001386b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386B 5428 bytes
SHA-256: bd900382056cd7cbdcbb8641d511fa86669e0b5d97734995327efede88dd2429
font_02_sfnt_off00014af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AF4 13876 bytes
SHA-256: cc33f22acd7e41cde8f54f1b43555fa88ef88e95739c5f686ae87f172742bb55

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