Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8fd91561dc024f6…

MALICIOUS

PDF

76.0 KB Created: 2021-04-02 12:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34d992b328fc5dd5c4463a5a0bc4dfde SHA-1: 9305e11c343e7300d27dd5e6b244a9cda6347d9c SHA-256: e8fd91561dc024f624943a0ff652b368693776cb94a23cf8ec2c676a6d7ebeb3
136 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains suspicious links to external domains, including one that hosts a PDF file, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the high risk score indicate a malicious intent to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://mezovuduw.ru/award?keyword=old+amharic+bible+pdf
    • http://sinagitozuram.22web.org/java_jdk_8_download_64_bit_free.pdf
    • http://muwazowezijowa.22web.org/persona_5_school_quiz_answers.pdf
    • http://supariwepexafat.mywebcommunity.org/monitoring_and_evaluation_plan_sample.pdf
    • http://numitofipepo.iblogger.org/4294867681.pdf
    • http://lejunuzegakikuv.mypressonline.com/how_long_to_cook_chicken_breast_on_lean_mean_grilling_machine.pdf
    • http://securitycheckingbrowservkcom.xyz/vitifujotofutoji6fpfd.pdf
    • http://nudistoff.club/90856457293xwxl.pdf
    • http://lujadexezusunam.22web.org/superficial_love_piano_sheet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wofaxil/buet_admission_test_question_2017-_18.pdf
    • http://pawepeg.atwebpages.com/abdominal_ultrasound_step_by_step_3rd.pdf
    • http://mifofofavu.rf.gd/luzujekexofobinolivu.pdf
    • http://lobosebaj.rf.gd/sample_balance_sheet_of_a_company.pdf
    • http://sawunalomagoda.epizy.com/zubawokapugikix.pdf
    • https://s3.amazonaws.com/xarojapi/how_to_get_married_in_india_for_foreigners.pdf
    • http://gejepif.epizy.com/skype_for_business_web_app_chrome.pdf
    • https://s3.amazonaws.com/nijudow/roxuxitosarodobed.pdf
    • http://piwunutid.epizy.com/antiplatelet_anticoagulant.pdf
    • http://sunuwib.epizy.com/how_to_determine_heat_exchanger_size.pdf
    • http://supuwevul.atwebpages.com/percy_jackson_son_of_neptune_quotes.pdf
    • http://rubedirixadul.epizy.com/70451022472.pdf
    • https://s3.amazonaws.com/wiwuxot/kenmore_elite_cordless_vacuum_reviews.pdf
    • https://s3.amazonaws.com/zopenave/10100002081.pdf
    • http://vusegax.rf.gd/burford_rustic_font.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_off0000ead2.bin
e6a5fddcf6440c1891c8047b6fbae9f14b6833177d4191a4078d95ce356787db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD2 5384 bytes
font_01_sfnt_off0000fcee.bin
657938881e44b5e996232c2fe38677bda4f8e6368635a8b20e834db5cec6b272		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEE 11176 bytes

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