Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a0d79750cc4ea09…

MALICIOUS

PDF

76.7 KB Created: 2021-03-31 20:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 44bb1abd114ce975cb75633f44ba4c1c SHA-1: 6b410157001ec2fcbfac5913d6c790ccfa02a431 SHA-256: 4a0d79750cc4ea090cb4cd6454773fc9f15fc3e526e93c6331122bb3941edbaf
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is likely used for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into visiting a malicious site, aligning with spearphishing tactics.

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://golowaki.ru/award?keyword=landscape+architecture+books+pdf PDF link annotation
    • http://xilenemivagola.mywebcommunity.org/12291090699.pdfIn PDF document text
    • http://nakenanizugaxit.iblogger.org/manual_testing_vs_automation_testing_quora.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/jagavaviwepagafo.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/archinteriors_48.pdfIn PDF document text
    • http://maturibcgj.space/maytag_maxima_washer_and_dryerrbmwg.pdfIn PDF document text
    • http://kengoru.space/24391068822kii4x.pdfIn PDF document text
    • http://bizuzagewad.iblogger.org/vubezalusanarafos.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/degusakisiwim.pdfIn PDF document text
    • http://kixiwogazu.sportsontheweb.net/gipugoxidewalov.pdfIn PDF document text
    • http://xifasiv.getenjoyment.net/grade_7_math_review_ontario.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nanojav.rf.gd/wexesatatutujisavex.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/mapiwojudazulusonezu.pdfIn PDF document text
    • http://fowosirid.rf.gd/takeweba.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/35979206295.pdfIn PDF document text
    • http://lozijuxul.rf.gd/23739894595.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/86503990106.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/judevuduzimujutikav.pdfIn PDF document text
    • http://razebegapusej.rf.gd/cellulose_fiber.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/properties_of_nanomaterials.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_off0000ed5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5B 5356 bytes
SHA-256: 789da68c79bcf0760b2d121ab2b0466852267e419d9467e4449f3f2bfa5bd3e5
font_01_sfnt_off0000ff8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8D 11152 bytes
SHA-256: d2863291b1755744adc916c9ab40ae1532364e2a560ae2ed25096ba54eaa29d5

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