Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c87a405fd89e263…

MALICIOUS

PDF

71.7 KB Created: 2021-03-01 03:59:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6b8d4d653cc38a38a6f1881d5744339c SHA-1: 9d625a517de379cafb62dd0cfe261078291b07fd SHA-256: 4c87a405fd89e2636e2ad781ce191ef918f5a0ede0e0fca89ace0825c47b79b9
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'resalured.ru', which is a strong indicator of malicious intent, likely for phishing or malware distribution. The document body's content, though partially obfuscated, includes a keyword that could be used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/wix?keyword=new+britain+high+school+address PDF link annotation
    • http://bulakirip.getenjoyment.net/pdf_won_open_in_paint.net.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/13493068229.pdfIn PDF document text
    • http://mebevevi.mywebcommunity.org/does_the_vivofit_jr_2_have_gps.pdfIn PDF document text
    • http://fobifisoba.22web.org/adobe_pagemaker_5._0_free_with_key.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/noxupivoxaniti.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/83582366396.pdfIn PDF document text
    • http://matroskin.space/felotikifituxivib31rn5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xapijifas/dreamboxedit_deutsch_mac.pdfIn PDF document text
    • http://sunemizamaxom.epizy.com/dakokipikipoj.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/casio_protrek_manual_3173.pdfIn PDF document text
    • http://lamerowed.rf.gd/tedasokosaratosezalem.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/nutrition_guidelines_school_lunch_program.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/50072467372.pdfIn PDF document text
    • http://tibibexubedumu.rf.gd/beamforming_ultrasound_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/89982495039.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/sikuxarewolevija.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/wotesu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE67 5192 bytes
SHA-256: 77d826b55f739adb01de2a03fa2278fd0d370d3f893aae7ee0e8ed2de21e1f86
font_01_sfnt_off0000e00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00D 10308 bytes
SHA-256: bd7541de98531aae9cd3a29364fda3556d7609b44b143a006d8ffff038da5564
font_02_sfnt_off00010354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10354 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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