Malicious PDF — malware analysis report

Static analysis result for SHA-256 98fa668a7c22396f…

MALICIOUS

PDF

110.4 KB Created: 2021-03-14 12:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 09584c071b5772fdd9b24b64e882ce5e SHA-1: 5943bd740a3ae649941695c4a85ecb17d3619fea SHA-256: 98fa668a7c22396f9d0758519b8fc36b663ce9b5f003944eb2da5f322f805790
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://nipisod.ru/award?keyword=east+african+community+history+pdf', which is likely intended to trick the user into downloading a malicious payload. No scripts were extracted, but the presence of external URIs and the high confidence detection scores indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/award?keyword=east+african+community+history+pdf PDF link annotation
    • http://anrostore.ru/dangote_sugar_annual_report_201308tdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454550/normal_6019d8d1d0ea2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373999/normal_5feb5e2cd7116.pdfIn PDF document text
    • http://kifavofo.22web.org/89844370854.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459636/normal_5fc70d71c4eb2.pdfIn PDF document text
    • http://jotafitosixa.getenjoyment.net/bewijewomevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451950/normal_6015a1684084a.pdfIn PDF document text
    • http://predouche.xyz/nancy_drew_and_the_hidden_staircase_2019_full_movie_onlinenoccd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418583/normal_5ff993bd78dd5.pdfIn PDF document text
    • http://wefilevazobakeb.mypressonline.com/anexarea_crimeei.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472773/normal_5ff8b235d0306.pdfIn PDF document text
    • http://tuwasukam.getenjoyment.net/fipiwofidizuzorilaweto.pdfIn PDF document text
    • http://am-sound.ru/cbse_class_5_maths_worksheets_with_answerscrqds.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367905/normal_5ffe0fdb56c28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kulebosux.myartsonline.com/women_of_the_bible.pdfIn PDF document text
    • http://vefodipox.myartsonline.com/39486232949.pdfIn PDF document text
    • http://zinezalidoratov.rf.gd/1656075879.pdfIn PDF document text
    • http://kunovudulex.rf.gd/microsoft_office_powerpoint_templates_free_2016.pdfIn PDF document text
    • http://limixumijegaf.epizy.com/bully_anniversary_cheat_menu_mod_apk.pdfIn PDF document text
    • http://gusutawidike.epizy.com/second_variety_pkd.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_off00016f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F69 5424 bytes
SHA-256: 1c3d80797629f1bf4a3092c2ca502be9327ce91dbd8d3d1521f8b22a3c8d1896
font_01_sfnt_off000181c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181C0 12080 bytes
SHA-256: cd28679df9a1603c95ed0e6a15497bc6b4e9295c81a03b3e2ef797df8392c924

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