Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f62a3a64d53a1e…

MALICIOUS

PDF

84.7 KB Created: 2021-02-24 17:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 76445dea1aa92f00deda68ae4ae562b6 SHA-1: c4d9a023280d9e0ae851cebe5a5fcdb4d7252bb8 SHA-256: 96f62a3a64d53a1e021aad6e69ca3805190841cda8c35e752c436ed5b82869cb
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to reference the title of a literary work to disguise its malicious intent. The presence of an external URI suggests an attempt to redirect the user to a malicious site for further exploitation.

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://jacksth.ru/award?keyword=a+la+recherche+du+temps+perdu+proust+commentaire PDF link annotation
    • http://jekeluxuto.mywebcommunity.org/41301688316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448137/normal_600a921331fbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467593/normal_601afdccac1a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370054/normal_601be6659506c.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/12382568766.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460230/normal_5fe374ac1d81d.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/hunter_x_core_will_not_reset.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/how_to_study_sanskrit_class_9.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/ritoma/barbie_doll_images_free_with_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/core_marketing_concepts.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/vewemewimupufipived.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/free_printable_templates_for_flyers.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/cute_baby_pic_dp.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/pexisogiverejadituno.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/80794522921.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/cellink_neo_app_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/how_long_to_learn_1000_chinese_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/doc_martens_size_guide_cm.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_off00010aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAD 5300 bytes
SHA-256: 508f2bc82a41a66a5a425c709c737f4819c368035b3a5bdb850aa2f4aba5097b
font_01_sfnt_off00011c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C84 12548 bytes
SHA-256: c88caebc7e33ee278e43e204e0faa422f3e0037db0b2eb050d9096fa4bb67d8d

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