Malicious PDF — malware analysis report

Static analysis result for SHA-256 6165a71f77c67baa…

MALICIOUS

PDF

76.3 KB Created: 2021-03-10 16:46:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 923163fbc349be3a5fe5b32c2357e9eb SHA-1: 9579f047f2488ae104d73b61286fd51d8bbe97b4 SHA-256: 6165a71f77c67baac2cf15b385a483cbdff8e7dceec9ae02f2e6f56e31096d60
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'ponafet.ru', which is likely a phishing or malware distribution site disguised as a search result. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/award?keyword=schaum+s+outline+of+bookkeeping+and+accounting+fourth+edition+pdf
    • http://oneitshop.info/fishbone_diagram_template_for_educationjzgkg.pdf
    • http://letnesil.xyz/lovadepowutomerltgar.pdf
    • https://cdn-cms.f-static.net/uploads/4446168/normal_604638c1ebb45.pdf
    • http://garanibukumom.scienceontheweb.net/30399058415.pdf
    • https://cdn-cms.f-static.net/uploads/4496811/normal_5fd8f01a41c28.pdf
    • https://static.s123-cdn-static.com/uploads/4494429/normal_5fe4e0e7e1c27.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7ef7ebf0-bcb0-4ca2-8538-5a19c3e9f01c.filesusr.com/ugd/aff7ca_a8cbe00902ce486aaaa0211bb07978ee.pdf?index=true
    • https://s3.amazonaws.com/ritoma/the_shack_houma_hours.pdf
    • https://s3.amazonaws.com/gezetega/omb_a-_122.pdf
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_2d89dc8c434141bb8e78a0f04af0a134.pdf?index=true
    • https://s3.amazonaws.com/dukavunivifa/dulemagovow.pdf
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_3557bcf5d69c4cb199e630a6579dbaa3.pdf?index=true
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_804c616d853449ca8525009d2cf65cf3.pdf?index=true
    • https://s3.amazonaws.com/tipikaxe/kiplinger_report_on_best_places_to_retire.pdf
    • http://xabudavadeguvo.myartsonline.com/xetavokubokebezubesa.pdf
    • https://s3.amazonaws.com/toliwudalamem/free_time_worksheets_grade_1.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeba.bin
0b54b078bef99338337e46bb4baf0eb58c40d6e64c1edf27ca7d61229ec8eaa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBA 5876 bytes
font_01_sfnt_off00010295.bin
3f8458001ee59aa260533498c73c5771ebd98c78913bd34dce633fb41e3530f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10295 10644 bytes

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