Malicious PDF — malware analysis report

Static analysis result for SHA-256 da904d51488c130f…

MALICIOUS

PDF

78.4 KB Created: 2020-11-13 21:24:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ffe30e34b8052ad99f829774de8ca01 SHA-1: 776cdb25e64f8798564752b9dc8a4ffd14aa12c1 SHA-256: da904d51488c130fa252f625a779191795976d309b7dc821c659c7e53aa7fd0f
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to host a phishing or malware delivery page. The document body, though heavily obfuscated, contains keywords related to 'LTE band frequency', suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://traffnew.ru/strik?utm_term=lte+band+13+frequency
    • https://cdn-cms.f-static.net/uploads/4374857/normal_5fa430338c298.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/memul/danomamapuzik.pdf
    • https://s3.amazonaws.com/lupuvogotog/archery_potion_terraria.pdf
    • https://s3.amazonaws.com/kavitokolezub/manual_practico_de_aceites_esenciales.pdf
    • https://s3.amazonaws.com/dazutun/adjectives_lesson_plan.pdf
    • https://uploads.strikinglycdn.com/files/775c21c2-8037-482b-b755-8b3b82c04e91/wofinarekasujigagimudo.pdf
    • https://s3.amazonaws.com/fasanag/statistical_analysis_of_geological_data.pdf
    • https://uploads.strikinglycdn.com/files/c0286717-52f5-41ee-b348-8abd4272e3fc/7581218603.pdf
    • https://uploads.strikinglycdn.com/files/6170588a-16cf-4b3c-935f-b55b95b1950b/89769162269.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de26.bin
895d5ded37d90fcb43ee3c42534c08d2c64e0c25b9e7f1e72f6fd7971f9cdaa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE26 5332 bytes
font_01_sfnt_off0000f064.bin
14afa6456d3c37db3685cce054be3382cabcaaa191671df35f2064540f0e9c33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF064 11532 bytes
font_02_sfnt_off0001169f.bin
d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1169F 16060 bytes

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