Malicious PDF — malware analysis report

Static analysis result for SHA-256 d26c21360a2173af…

MALICIOUS

PDF

74.9 KB Created: 2021-02-16 00:01:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 83a7c205ed0f2e2c14a708f7c34d0800 SHA-1: a69fdcfaa6c5f747944c1d8a05e78dc1e198fa0a SHA-256: d26c21360a2173af8714a20dca3e558b8508a3bd53668b2e1a8fe924b2f36008
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 as malicious by ML classifiers and ClamAV. The document body, though heavily obfuscated, suggests a lure related to educational worksheets. The presence of external URIs indicates an attempt to redirect the user to a potentially malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jottigo.ru/123?utm_term=adding+and+subtracting+integers+worksheet+grade+7+pdf PDF link annotation
    • https://jaxoruxevag.weebly.com/uploads/1/3/1/6/131606876/2193774.pdfIn PDF document text
    • https://cdn.sqhk.co/legikowe/fje6icW/74578674061.pdfIn PDF document text
    • http://xevidome.iblogger.org/camera_360_lite_apk_old_version.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385230/normal_5fe45e2fc41b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421039/normal_60118a9a88083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484609/normal_5fe948c193548.pdfIn PDF document text
    • https://cdn.sqhk.co/nivusenavazo/hdemhjh/chatous_camera_not_working.pdfIn PDF document text
    • https://zorovapi.weebly.com/uploads/1/3/2/3/132303286/855fa19923d82.pdfIn PDF document text
    • https://susejovidexoxi.weebly.com/uploads/1/3/0/7/130775922/480999f060cbf.pdfIn PDF document text
    • https://cdn.sqhk.co/dimumaneda/fv8gdia/gseb_rechecking_form_2019_science.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467955/normal_5fd7c6353103d.pdfIn PDF document text
    • https://xetebozeb.weebly.com/uploads/1/3/1/8/131872130/lujef.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/zeworibuzoza/manualidades_faciles_para_nios_2_aos.pdfIn PDF document text
    • http://ratazudawi.epizy.com/ct_file_candy.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/lightroom_presets_png.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/phonics_books_free.pdfIn PDF document text
    • http://tezipibuboxigo.epizy.com/fegemivumemimukujaloxa.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/92851159009.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_off0000e573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE573 5748 bytes
SHA-256: 8c970c0832a719aef2eabde50ce4e4dff17257ceb07dd8403f75d4d5d555c606
font_01_sfnt_off0000f91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91C 11072 bytes
SHA-256: 23ade495045c8f11c9d57a419888f678153430431a5e583cccc657384969ee68

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