Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c338a716277c91…

MALICIOUS

PDF

74.4 KB Created: 2021-03-04 09:11:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 7267ab8716a9e00a28a29da39d35cb65 SHA-1: 37c2a4e0c2d247474bd1b13bb7f3742c28ae0d2b SHA-256: 78c338a716277c914845663c3c32af859b6915357e5324fd2fcb081ba84f49cb
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that masquerades as a search result for educational material, likely to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a potentially harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/wix?keyword=guided+reading+activity+answer+key+economics PDF link annotation
    • http://jsexj.fun/69057046101125th.pdfIn PDF document text
    • http://sekelenogake.getenjoyment.net/9771683768.pdfIn PDF document text
    • http://alkostore.xyz/visual_basic_book_by_sushil_goelje06p.pdfIn PDF document text
    • http://all-gopro.com/briggs_and_stratton_500_series_158cc_specsb9632.pdfIn PDF document text
    • http://securityverifiedservices.com/collective_nouns_worksheets78eg.pdfIn PDF document text
    • http://limons.space/60395796408u8s3.pdfIn PDF document text
    • http://kmikaerfs.ru/bapamuwutasiv6kctb.pdfIn PDF document text
    • http://sedouche.xyz/how_to_make_homemade_chili_crockpotv1zhk.pdfIn PDF document text
    • http://idealica-italiaoficial.site/75882329826rzrjw.pdfIn PDF document text
    • http://nosinoski.shop/coleman_generator_1850_pricejiack.pdfIn PDF document text
    • http://best-ital.fun/jackson_kayak_fun_runner_70cgkde.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/wovugi/idsa_cryptococcus_guidelines_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/hawes_and_curtis_shirts_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/78278650683.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/sutujikabunevujulador.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/32885430949.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/mefixazodasobiraxiwogafem.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/75130953888.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/kunirurezite.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_off0000e586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE586 5576 bytes
SHA-256: 5aefc4d128940aaf9de48dc7c736e7df53af8aeb941e602a5bfe73dae2e9f9ab
font_01_sfnt_off0000f896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF896 10492 bytes
SHA-256: 104a654af87c9949884224396b214ca0f77ad52db64b08a4ca42fcca8577f649

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