Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9102bbb8d35adf7…

MALICIOUS

PDF

77.9 KB Created: 2021-03-03 04:22:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 0e1268704dddabbbbdad6a5c57831f5a SHA-1: d7c368fb06a0c5be3a9061c30f825f7a0041c711 SHA-256: a9102bbb8d35adf7c539e48d87a1267b4d2d08c0a743172691f185b3ebd91f57
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. ClamAV and ML classifiers also flagged this PDF as malicious. The document body, though heavily obfuscated, appears to reference a technical issue ('danby dehumidifier ec code fix'), suggesting a pretext for the malicious link.

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://seumenha.ru/strik?utm_term=danby+dehumidifier+ec+code+fix PDF link annotation
    • http://train-home.ru/how_do_i_get_mds_certifiedoxnqh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445334/normal_5fdcf943ddae9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386591/normal_5fc66e5e4335c.pdfIn PDF document text
    • http://starkrobotics.org/sivap0izmt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375339/normal_5fddf530dd8df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426819/normal_60201176479ca.pdfIn PDF document text
    • http://nadozigipak.22web.org/android_auto_2016_mazda_3.pdfIn PDF document text
    • http://carluxepaint.site/givovivozusunobixi07c4k.pdfIn PDF document text
    • http://tuwasukam.getenjoyment.net/fipiwofidizuzorilaweto.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/how_to_train_your_dragon_characters.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/sejakopa/wizetidoxem.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/23017646256.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/simizolupurikaf.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/apex_legends_stopped.pdfIn PDF document text
    • http://musajaso.epizy.com/liferay_interview_questions_and_answers_for_experienced.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/nukedefipekixuw.pdfIn PDF document text
    • http://voxinuxo.epizy.com/business_model_canvas_powerpoint_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/how_to_find_the_volume_of_a_cuboid_without_the_length.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/44940265897.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_off0000f314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF314 5360 bytes
SHA-256: f8ed0f343311c7253a3e54f850a6c4fb1ab8490af5ebd80e73a5debafa7d00e1
font_01_sfnt_off00010539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10539 10828 bytes
SHA-256: 03037dfe27005122308e54a4f301f1db3a532c3e07a88a9ea7782086545a5adb

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