Malicious PDF — malware analysis report

Static analysis result for SHA-256 da3212d7d9cb45e7…

MALICIOUS

PDF

108.3 KB Created: 2021-04-28 07:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a32c947f6e56162067e93ee352002c85 SHA-1: 7cfbe345a4899fa1f6a1c6fb1b0f4e42ef46040a SHA-256: da3212d7d9cb45e7ff0861f67551a560ec1c7a1b3d7f9672e4220ac0d9a4179a
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URIs, with one pointing to 'https://zajinet.ru/strik', suggesting a phishing or malicious redirection attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure, likely delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=jaybird+x3+vs+x4+reddit PDF link annotation
    • http://buyervannakupitvsem.xyz/comic_de_scott_pilgrim_a_color_en_espaol9qows.pdfIn PDF document text
    • http://didazema.mypressonline.com/zidebekututojom.pdfIn PDF document text
    • http://joxitikoki.getenjoyment.net/92213029459.pdfIn PDF document text
    • http://hopecommunitynaz.com/ktm_950_adventure_repair_manualr3qju.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/applied_multivariate_methods_for_data_analysis_johnson.pdfIn PDF document text
    • http://tipografiyav.moscow/lazavotafewupesepy1gwp.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/YieSgJG/checker_yellow_cab_company_columbia_sc.pdfIn PDF document text
    • http://tipografiyav.moscow/delta_luv_crib_model_4750-1_instructionsay27c.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/PBgjagh/gas_price_5_year_history.pdfIn PDF document text
    • http://instasale.company/sc_dmv_appointment_confirmationp2ov1.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/divikufifir/zodukikelazafatiwogekozer.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/75271441729.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/thenx_handstand_guide.pdfIn PDF document text
    • http://biwefejiza.myartsonline.com/thousand_splendid_suns_movie_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/6585595686.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/how_to_draw_out_deep_cystic_acne.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/vce_exam_simulator_2._3_4.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000180af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x180AF 20860 bytes
SHA-256: 450e4ac1ab3e5a4686b6f69b583e86aef3b006ebdeddbc606a09f4d66156b35c
font_00_sfnt_off00014573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14573 5400 bytes
SHA-256: 52f33bba9d0839f45515ae36ea6e7d227c62f7b46d8a665fdfe0469d61d87870
font_01_sfnt_off000157f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157F0 11896 bytes
SHA-256: dae22708ff94dd04c0a45a130e681137b408b291225cb968f9fdf2723ce7a279

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