Malicious PDF — malware analysis report

Static analysis result for SHA-256 38dc1a484d21687c…

MALICIOUS

PDF

72.4 KB Created: 2021-02-08 03:42:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 42c6d0fc956dbbad5ae9f398e333c59c SHA-1: 209adad669ab77d2d184fe23baf6ce0c61141c4c SHA-256: 38dc1a484d21687cf847f2f0f8fc13309323f2ae7d8e4d79481170e6e8fd9ad5
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/wb?keyword=surat%20akreditasi%20ban%20pt%20undip PDF link annotation
    • https://cdn.sqhk.co/kufomopinu/UMcjegc/52835402169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474205/normal_5fd26510a92c9.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/gdjjShi/23854659007.pdfIn PDF document text
    • https://cdn.sqhk.co/xewebevij/Hjgjghk/dead_space_apple.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415534/normal_600ad9e0d192b.pdfIn PDF document text
    • http://rakakap.iblogger.org/jimmerson_lake_fishing_report.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368240/normal_5fe5b7f1aeaf1.pdfIn PDF document text
    • https://cdn.sqhk.co/tuminageka/isjbjc7/43263794863.pdfIn PDF document text
    • http://nususolajegak.iblogger.org/cerebrovascular_disease_guidelines_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/igHHRgd/66364816419.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/gffArgc/jumimovina.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/B3Jvvjf/vugimagotogumomep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494136/normal_600f7d8b10f99.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jawevobafepen.epizy.com/apta_guidelines_for_student_supervision.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/zabuzerubutirulorinij.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/que_es_answer_questions_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/free_sales_proposal_templates_for_word.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/92443015073.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_off0000dcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB3 5228 bytes
SHA-256: 80b0c5a9f36b82d14a075ab5466eaa5587e2d1a8adcb77002d78691fc12a9ef8
font_01_sfnt_off0000ee7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7D 10788 bytes
SHA-256: 99259dc790d6a0858e5c5882099f8991c773326963ec3c923464fe8a5022506d