Malicious PDF — malware analysis report

Static analysis result for SHA-256 e885875b9013470c…

MALICIOUS

PDF

86.5 KB Created: 2021-03-11 02:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d391d9e2d2b135e8bec5085cecba66a SHA-1: dc81772a029d6dc2aec08f1b5e4831267eb7200d SHA-256: e885875b9013470c2a5d7594ba1be31cdce39a01ff12184e04e7a3ea5d486cda
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, appears to reference the PDF and its creation tool, suggesting a lure to download or view content from the external URL. The presence of an external URI and the high ML score indicate a strong likelihood of malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dafemum.ru/123?utm_term=alternanthera+philoxeroides+pdf
    • http://jatepemiv.22web.org/a1c_goals_by_age_chart.pdf
    • http://toteganutiv.66ghz.com/83789210944.pdf
    • https://lojigimab.weebly.com/uploads/1/3/0/8/130814508/guzovubaneziluvogi.pdf
    • https://cdn-cms.f-static.net/uploads/4426072/normal_601aa0f761d85.pdf
    • https://mabatuba.weebly.com/uploads/1/3/5/3/135303696/e4b8526d.pdf
    • https://xedowekogo.weebly.com/uploads/1/3/4/6/134609622/luziwuzivajur_dudunexox_fadedeve.pdf
    • https://cdn-cms.f-static.net/uploads/4427274/normal_5fdb0bf692238.pdf
    • https://static.s123-cdn-static.com/uploads/4417656/normal_5fedc47d4cfe1.pdf
    • https://gobodukigibab.weebly.com/uploads/1/3/1/8/131856162/12290d6c801.pdf
    • https://static.s123-cdn-static.com/uploads/4477386/normal_5ff636ba189a7.pdf
    • http://wamepiguvoj.iblogger.org/birch_plywood_sheets_24mm.pdf
    • https://cdn-cms.f-static.net/uploads/4475987/normal_6026050b810e7.pdf
    • http://tafasizogir.22web.org/vitamix_e320_explorian_blender_vs_7500.pdf
    • https://wugizagopa.weebly.com/uploads/1/3/5/3/135311922/kazezup-rusizata-zojatex-menomesu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wezegene.rf.gd/past_simple_and_present_continuous_exercises_with_answers.pdf
    • https://s3.amazonaws.com/wotodedaruzuk/56280740404.pdf
    • http://kepepisex.epizy.com/2nd_line_pro_apk.pdf
    • http://tumozuj.epizy.com/bratislava_tourist_guide.pdf
    • http://reniwen.rf.gd/7105444168.pdf
    • https://s3.amazonaws.com/nevowimo/48992102023.pdf
    • http://tebexuvizo.rf.gd/febrile_neutropenia_guidelines_nccn_2017.pdf
    • https://s3.amazonaws.com/petuzutemixuvod/8751960628.pdf
    • https://s3.amazonaws.com/buganabowumujef/crystal_reports_training_online_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011539.bin
d8cd8d4469101cb86b415c280f444a0571c18cc9fa9d147271079494d3759679
pdf-font-stream PDF embedded font (sfnt) at offset 0x11539 5184 bytes
font_01_sfnt_off000126d8.bin
56f9fc93b576714b6ef6e43f8b2a443b5df6c28932620bd934768045970fc49e
pdf-font-stream PDF embedded font (sfnt) at offset 0x126D8 11288 bytes