Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc1a0aa3ad4b2117…

MALICIOUS

PDF

81.0 KB Created: 2021-04-17 22:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 821687bc25a16de64975d82e88129d68 SHA-1: dbde44be3488346eec9f61cc78f4eebee413c6f3 SHA-256: dc1a0aa3ad4b211794d230315e87af7026b723e10aef4505f4f31be6ad9fff7a
96 Risk Score

Malware Insights

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

The PDF contains a heuristic indicating an external URI, specifically a URL that appears to be a lure for downloading a movie. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the overall detection profile point towards 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://golowaki.ru/strik?utm_term=the+boy+in+the+striped+pajamas+full+movie+online+free+download
    • https://cdn-cms.f-static.net/uploads/4383450/normal_6067744e5db6b.pdf
    • http://lumogodasekepi.mypressonline.com/kimapoveporirigub.pdf
    • http://sunufosabupes.scienceontheweb.net/defawow.pdf
    • http://zifeladawu.scienceontheweb.net/jifosuvagapezebivogasexon.pdf
    • http://bokulidedasez.22web.org/67887870757.pdf
    • https://cdn-cms.f-static.net/uploads/4416144/normal_60128b48a93d2.pdf
    • https://cdn-cms.f-static.net/uploads/4483623/normal_603ba4733c784.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://miwewugewu.atwebpages.com/922767307.pdf
    • http://retuliz.rf.gd/kazuxebageje.pdf
    • https://s3.amazonaws.com/lekezaru/how_to_pass_cdl_test_in_texas.pdf
    • https://s3.amazonaws.com/dovulavavo/werenaw.pdf
    • https://s3.amazonaws.com/zerejibixupav/rorobuvebogosa.pdf
    • https://s3.amazonaws.com/garorowa/free_cookbook_cover_template.pdf
    • https://s3.amazonaws.com/nosepevozux/drinkwell_pet_fountain_charcoal_replacement_filters.pdf
    • https://s3.amazonaws.com/gimisorixosu/57995181044.pdf
    • https://s3.amazonaws.com/jitimesolagun/lobutidanebuxabomoba.pdf
    • https://s3.amazonaws.com/wibedubosateg/8728758449.pdf
    • https://s3.amazonaws.com/tarajix/wetemulosorapug.pdf
    • http://zaduzos.myartsonline.com/definition_of_business_research.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_off0000fcb7.bin
a43a3404422119b34670704388ae6808a1d61b8ac97a914d48350a43ccc13375
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB7 5700 bytes
font_01_sfnt_off00011000.bin
286e252c835ccfc3981bcce70be08bd638c3c8183be773825657665086065c5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11000 11436 bytes