Malicious PDF — malware analysis report

Static analysis result for SHA-256 958bc0503a82631c…

MALICIOUS

PDF

74.1 KB Created: 2021-03-07 12:24:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 645d2db0affa8525b50f4b8af3a3de6d SHA-1: 63f0ff0b10fdc6a962dac01d45e89a45783c6fce SHA-256: 958bc0503a82631c2f8b127e5568be1128d7afdb0e82f7ec8867318da0a18fc6
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely a phishing lure disguised as educational material. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, potentially for credential harvesting or further malware delivery.

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://vilenefex.ru/123?utm_term=common+core+reading+comprehension+worksheets+8th+grade PDF link annotation
    • http://gepopusoka.mypressonline.com/59470451366.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/gejumulowag.pdfIn PDF document text
    • http://rezisekuvaz.mypressonline.com/89780022138.pdfIn PDF document text
    • http://wirobigi.medianewsonline.com/baldurs_gate_2_jaheira_romance_dermin.pdfIn PDF document text
    • http://hookup673.site/proving_triangles_congruent_asa_aas_sas_sss_worksheet_answers1olic.pdfIn PDF document text
    • http://dreabling.online/95599755262cs4bw.pdfIn PDF document text
    • http://sewonmedix.ru/area_51_movie_in_tamilmck8x.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/fikuvine/19817243288.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/kawasaki_ninja_400_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/common_saying_by_the_skin_of_your_teeth.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/blink-_now_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/moringa_et_ses_vertus.pdfIn PDF document text
    • http://xekabotiwuker.atwebpages.com/kopaxidazi.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/non_homogeneous_differential_equation_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/54644412196.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/wow_garrison_legion_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/anne_klein_watch_repair_order_form.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/17231667527.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/zupirekirawasewu.pdfIn PDF document text
    • http://xobebol.onlinewebshop.net/vulozojunogujure.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_off0000e144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE144 5708 bytes
SHA-256: 2045da2a8b03475d9063f332a838fae44fb94df317688a0ba59ed3555eeaf1f4
font_01_sfnt_off0000f490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF490 11240 bytes
SHA-256: 319e1d4a547d228623eedccacefe54bddd5bd120c782e2022dddfb751c8b9736

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